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Our backcountry experts tested 13 women's-specific sleeping bags meant for all types of overnight adventures, temperatures, and budgets, and here are the best among them
Credit: Trish Matheny
By Jessica Haist ⋅ Review Editor ⋅ Updated May 16, 2026
A warm, cozy sleeping bag is at the top of the list of essential gear. Whether you're after the lightest and most packable option for high alpine objectives or a spacious bag to keep you warm while car camping with friends, we've got the down-low to help ensure you're well-rested for many adventures to come.
Of more than a dozen options we've tested, our favorite women's sleeping bag overall is the Western Mountaineering Alpinlite. The Alpinlite is a wonderfully simple, lightweight, 850+ goose down, mountain-ready design that allows you to adjust the down's placement for customizable comfort and warmth.
If you find yourself adventuring in wet climates and prefer a water-resistant synthetic sleeping bag, the NEMO Tempo 20 Synthetic is a solid and affordable choice. Or if you're looking for an affordable down construction for added loft and comfort, check out the Kelty Cosmic Down 20.
Since 2018, we've tested dozens of the best women's sleeping bags. We have carried these bags on our backs and spent many chilly nights snuggled up, sleeping under the stars, under a tarp, or inside tents. We spend most of our time outside, exposed to all seasons and weather conditions — soggy, humid, cold, and dry — allowing us to continually scrutinize specific performance metrics like weight and comfort in the field year-round.
Editor's Note: Our women's sleeping bag review was updated on April 29th, 2026, to include new award winners from the latest round of testing like the REI Magma 15 and Kelty Cosmic Down 20.
850-fill-power water-resistant goose down (bluesign approved)
Female-Specific Features
varying widths and lengths for inclusive sizing
Fill Weight (Size Tested)
21.5 oz (medium narrow)
The REI Magma 15 is the best sleeping bag for everyday backpackers and campers seeking a good balance of warmth and weight with a fully customizable design. The warm 850 FP waterproof goose down, along with durable water repellent (DWR) treatment, helps keep moisture at bay, while the high loft and supple interior create a soft, cozy feel. Consumers can select from up to nine dimensions to customize their fit to their specific body shape, size, and personal preferences. This custom fit not only amplifies comfort, but it also eliminates cold air drafts along with unnecessary weight and bulk for those who plan to backpack efficiently.
The design is simple, featuring a large hood that's easy to adjust from the interior of the bag. We like that the zipper is longer than most, so it can be fully unzipped and used as a blanket. The main zipper is a beefy two-way construction with anti-snag lining to prevent fabric from getting caught in the teeth. The trapezoidal foot of the bag allows more space for our feet without increasing draft, while the neck baffle helps tuck you in for a solid night's sleep.
The Magma 15 is lighter and more packable than most down sleeping bags we tested, taking up very little room in our pack. At 2.4 pounds, it's light enough to take for a few days of backpacking. The neck baffle is more detached than most other designs in the lineup, and our lead tester found it necessary to readjust during the night, “it's easy to position when I'm just getting into the bag for the night, but I move so much in my sleep that I noticed myself constantly adjusting the baffle to reduce cold drafts throughout the night.” While the bag includes a stash pocket for small essentials, it doesn't have a zippered closure to securely stow them, and if you move a lot in your sleep, you'll find them loose inside the bag. Minor drawbacks aside, we love this comfy and customizable design for everyday trips thanks to its thermal efficiency and relatively lightweight and packable size.
The REI Magma 15 is perfect for everyday backpackers seeking a custom fit within a super lofty and comfortable down construction. Credit: Trish Matheny
Available in a “short” length, which is a standard women's size
Fill Weight (Size Tested)
17.0 oz (5 ft, 6 in)
The Western Mountaineering AlpinLite is our favorite, most luxurious women's sleeping bag. The extra-warm 850+ goose down construction provides a 19-ounce fill weight, paired with an ultralight, durable nylon exterior and interior that's both comfortable and quiet during nights spent under the stars. “Although the unisex bag does not offer any women's specific features, I found the short length fits me well and is true-to-size for a standard female up to 5 feet, 6 inches tall,” says our lead tester. We love that we can customize the location of the down to meet our specific preferences, whether moving all the down to the top for extra warmth or distributing it to the bottom on warmer nights. The simple design lacks any extra features of note, including an anti-snag zipper. But we found every component to be reliable and effective.
While the extra space inside the chest of the Western Mountaineering AlpinLite may add extra comfort for some, it can also increase cold air drafts for others. “I enjoyed the extra room inside the bag to shift positions and sleep on my side, but it also created some space for cold air to permeate the bag,” says one tester. Though, this is easily remedied by physically shifting the down feathers to the top of the bag. While this simple sleeping bag's performance blew us away, we can't help but acknowledge the expensive price tag. But, made in the United States and constructed of responsibly sourced goose down, this bag's high-quality materials are built to withstand our most demanding mountain adventures and it's lasted us through many adventures. All told, the stripped-down AlpinLite is for those seeking to maximize warmth and packability, thanks to the highly compressible design.
Although the AlpinLite features a simple design without an anti-snag zipper, it quickly became our favorite of all the bags that we tested. Credit: Trish Matheny
The Kelty Cosmic Down 20 is the best value for a womens down bag thanks to its women's-specific features and cozy interior liner that makes for a great night's sleep. The 550 FP duck down includes a hydrophobic treatment, some synthetic fill, and a DWR coating on the exterior recycled nylon shell, which helps protect the bag from water damage. The narrow shoulders, wider hips, and extra insulation for the extremities make this great for women who struggle to maintain body heat in colder temperatures.
The Kelty is likely several hundred dollars cheaper than expensive down bags because it's filled with duck down instead of goose feathers. The tradeoff is that this type of down tends to clump overtime which can impact the warmth with heavier use, but if you only plan to use it occasionally, it'll still last you several summers. At 3.24 pounds, it's also one of the heavier sleeping bags we tested, which is noticeable on multi-day trips. That said, it's great for car campers and weekend backpacking. While the bag's dimensions were perfect for our 5'6" tester, taller women should also look for other options. “I can't imagine being any taller and trying to fit comfortably inside the design,” said our tester. All told, if you're new to backpacking or looking for a comfortable down bag without putting down hundreds of dollars, the Kelty Cosmic is the best option.
The Kelty Cosmic Down 20 is a budget-friendly down construction that's perfect for ladies who are after a women's specific fit within a lofty and cozy hydrophobic down design. Credit: Trish Matheny
The NEMO Tempo 20 Synthetic is the best value for a synthetic, water-resistant bag as its impressive design mimics the luxury and comfort of down. The 650 synthetic fill maintains loft even in damp conditions, while the outer nylon shell, along with water resistant treatment, effectively keeps moisture from seeping into the bag's interior, making the Tempo a great choice for wet and cold climates. The Tempo even kept us warm and toasty during more than a few unexpected snowstorms. The oversized draft collar is perfect for tucking yourself into this spacious design, and the collar's materials and the jersey knit of the pillow sleeve feel great against our skin. “The loft mimics the luxurious, cozy feel of down-filled options, while the bag has a soft interior and spacious fit made it easy to rotate positions throughout the night.” said our tester.
At 4.36 pounds, the Tempo is heavy, eliminating versatility between car camping and backcountry use. However, the heavyweight design and draft collar create a cozy feel like sleeping beneath a weighted blanket. The heavyweight construction, along with the odd 13" by 13" cube shape, makes this bag tough to stow in a backpack for extended trips into the backcountry. And, while the hood is deep and well-insulated, it doesn't accommodate all backpacking pillows. “I found it easier to fit my down jacket inside (rather than a pillow) before zipping the hood and cinching it tight when cold weather rolled in,” said our tester. Finally, while the draft collar is great for that extra tucked-in feeling and keeps the cold out, it can be a little unruly when not tucked into place. But, all told, if you want an extra cozy bag that's great for wet-weather, cold climates for camp camping or extra short backcountry trips, the Tempo is an exceptional value.
The Nemo Tempo 20 features a unique Stow-or-Go hybrid storage cube that is both stuff sack and compression sack within a cube design. This heavyweight synthetic construction is perfect for a cozy night of car camping or on the river when you're not concerned about the weight and packed size of your bag. Credit: Trish Matheny
Four-chamber hood and neck collar for extra warmth
High-quality design and materials
Built for performance in the mountains
CONS
Expensive
Heavy compression sack
SPECIFICATIONS
Temp Rating (Lower Limit)
15°F
Measured Weight (Size Tested)
2.05 lbs (regular)
Insulation
800 FP Down
Female-Specific Features
Available in a “short” length, which is a standard women's size
Fill Weight (Size Tested)
20.2 oz (regular)
The Mountain Hardwear Phantom 15 is a high-quality sleeping bag built for three-season mountain performance. Although the bag only features 800 fill down, it also includes a substantial neck collar, a four-chamber hood, and a baffle that covers the full length of the zipper, which creates more warmth and increases comfort. The slim-fitting mummy-style bag is another key feature that more effectively traps body heat while eliminating cold air drafts within the bag. If you don't like the sounds of those tighter dimensions, we'd recommend bags like the Feathered Friends Egret UL 20, which offers another four extra inches in the hips.
The Phantom is also highly packable, sold with a compression sack that allows you to maximize the space within your backpack, and is relatively lightweight at 2.05 lbs. The 15-denier nylon ripstop interior creates a soft and cozy sleeping environment, while the black interior is designed to harness the sun's energy to dry quickly. The bag also features a durable water-resistant finish on the 10-denier nylon exterior, which we found to be a key component in protecting the down feathers on the interior from packing out and losing loft, thereby decreasing the bag's warmth. “This is the bag I would select for the best performance in an alpine setting,” says lead tester Trish Matheny. The beefy two-way zipper has been upgraded to include anti-snag technology as well. This prevents the zipper from getting stuck on the fabric when opening and closing, and from trapping you inside.
Of all the high-end luxury down sleeping bags we've tested, the Mountain Hardwear Phantom is the one we think will perform the best during alpine adventures, thanks to its high-performing water resistance. Our leader tester's final assessment was short and sweet: “This design is somewhat minimalist, foregoing additional bells and whistles to keep the bag warm, lightweight, and packable, and the final result delivers where I think it counts most.” We note that the included compression sack is slightly heavier than the others we had in hand. The zipper also includes a glow-in-the-dark pull, which may be design overkill when discussing a minimalist bag. Yet we found it helpful once the sun set, and it does make it easier to slide the zipper up and down the length of the bag.
The Feathered Friends Egret UL 20 is a functional and lightweight sleeping bag with luxurious 950+ goose fill down, protected by a Pertex Endurance UL exterior fabric. There's no doubt that this high-end bag sets a high bar for other down sleeping bag manufacturers, as the down fill is much warmer per square inch, requiring less total quantity while saving on weight. It is one of the lightest bags in this review and one of the warmest, offering a winning combination of warmth and weight. “I found the Egret to be very compressible, packing down into a small, easy-to-carry package,” says one tester.
While it is difficult to find many flaws within the functional design of the Feathered Friends Egret UL 20, we found ourselves right in the middle of the two available sizes, lengths designed to fit 5'3" (size small) and 5'9" (size medium). Our 5'6" lead tester reports, “I had to size up, which resulted in extra space inside the bag that created a draft; I especially felt it when exposed to high winds and light rain while camped in an open bivy.” Anyone who lands between sizes may find themselves cramming into the bag or wishing it were less drafty due to unnecessary extra space. There is also generous sizing around the hips. This may work great for some sleepers, but it leaves room for additional draftiness for others — it all depends on body shape and height.
We also found the Egret UL 20's down packs out faster than we'd like to see. This can detract from the overall warmth of the bag over time. Its shell material is also more rigid and noisy than other fabrics we've tested. These small complaints aside, this is another excellent goose down-filled option for long trips into the backcountry anytime between spring and fall in most climates.
The Feathered Friends Egret provided a good night's sleep amid wet and humid conditions in this open bivy below the day's objective. Credit: Trish Matheny
The Big Agnes Torchlight EXP 20 is the perfect down-filled construction for those seeking to customize their sleeping arrangement with every available feature under the sun. The 650 down fill is packed into a 20-denier Recycled Polyester ripstop shell that feels soft and cozy next to your skin. The unisex bag provides no features specific to a woman's body. Yet, it includes expandable side panels on both sides of the bag to create 10 additional inches of space for those willing to sacrifice a degree of warmth for extra space inside the design. Anti-snag zippers on the main opening help reduce friction with the interior lining. At the same time, the exterior “pillow barn” easily holds a backpacking pillow or down jacket in place even when shifting position throughout the night.
We love that we can attach a liner to the interior. It also has an extra exterior fastening system that combines our sleeping pad and sleeping bag into one unit and prevents slipping and sliding, even on uneven ground. “I would have loved to have this sleep system when I spent a month in an open bivy while climbing in Chile or on nights I've slept in the alcove on El Capitan,” says lead tester Trish Matheny.
Of all the down-filled bags we tested, the Big Agnes Torchlight EXP 20 is one of the few that produced significant heat loss when some features were used. “I couldn't help but notice the warmth that escaped the bag when I opened up the expandable side panels,” says our lead tester. We recommend taking advantage of this additional space and comfort only on warmer nights. The Torchlight seems to perform best around temperatures above 32°F, a comfort rating much higher than other bags we tested. While this bag is highly compressible and packable, the included storage bag and stuff sack don't allow for maximum compressibility. All told, for those who want options to dial in their perfect night's sleep, the Torchlight stands apart from the rest with adjustable features to keep you comfortable.
The Torchlight EXP 20 is the latest iteration of the unisex design that offers every feature you can possibly imagine. It combines your sleeping pad and the bag into one unit, which is nice for those who tend to rotate positions in their sleep. Credit: Trish Matheny
Product Comparison Table
Open bivies in humid climates created the perfect testing ground for our latest round of sleeping bags. Credit: Trish Matheny
How We Tested
As is our standard practice, we researched hundreds of sleeping bags for women before purchasing the most compelling models in this review. Then, to create our tests, we needed to identify the most critical factors that contribute to the performance of a women's specific sleeping bag. We identified key performance areas to focus on while testing the bags before spending months taking them out to use in the field. We carried them on rugged backpacking trips in various mountain ranges in the U.S. and South America and snuggled up on car camping trips to the desert, National Parks, and climbing areas. For additional details on our testing, see our full How We Test article.
Our women's sleeping bags testing is divided across five rating metrics:
Warmth (25% of total score weighting)
Weight (25% weighting)
Comfort (20% weighting)
Packed Size (15% weighting)
Features (15% weighting)
Why Trust GearLab
This review was crafted by outdoor educator and guide Jessica Haist and mountain athlete and all-around outdoor expert, Trish Matheny. Jessica holds a Master's Degree in Adventure Education from Prescott College in Arizona. Originally from Canada, she moved to the U.S. after growing up in Toronto and later migrating to the mountains of British Columbia before heading south. She now resides in Mammoth Lakes, CA, amidst her beloved Sierra Nevada, where she frequently goes backpacking, mountain biking, climbing, and skiing. As an avid and multifaceted mountain athlete who has spent time in cold environments, Jessica has a keen eye for the essential features of a women's-specific sleeping bag. Trish spent over a decade exploring the Tetons on her splitboard, including numerous range traverses within the Greater Yellowstone ecosystem during the spring, before relocating west to establish a home base in the Sierra Nevada. She now splits her time between Crowley Lake in the Eastern Sierra and Yosemite Valley, California, where she is a member of the Yosemite Search and Rescue Team. Much of her time is spent living outside in a sleeping bag, whether in her truck on the road or in her wall tent outside Camp 4, providing ample opportunities to test equipment and fine-tune her preferences. Her extensive outdoor experience has taught her the importance of selecting the right gear for the job to maximize your activities and recovery time, even after multiple big days and big efforts in the high mountains.
We spent many nights inside each sleeping bag that we tested to evaluate their performance over each test.
Analysis and Test Results
Why choose a women's specific bag? It may seem obvious, but physiologically, women are different from men. So, these differences should be taken seriously when choosing something as important as a bag that will keep you warm and well-rested for a big day in the mountains. Everyone wants to find the most suitable product for their needs; for most women, that will most likely mean choosing a bag tailored to their unique physical dimensions and hot/cold tolerances. This is especially true for shorter adults. If you have struggled to find a bag that doesn't have you swimming in extra material, a women's-fit bag will be a great place to start and often delivers more bang for your buck. Almost all the bags we tested in this review have at least the same amount of insulation, if not more, than the corresponding men's models. Women's bags are smaller and have less volume, so they often have more fill per square inch in the final product.
The AlpinLite is easily topped our list as the overall favorite sleeping bag whether you're on a fast and light adventure or simply sleeping near the trailhead. The “short” length was perfect for our 5'6" lead tester and the loft of the 850+ goose down fill is tough to beat. Credit: Trish Matheny
After many months of testing, we compiled our assessments, compared specifications, and wrote this review. Our testers' experiences with these bags, including car camping, thru-hiking, big-walling, and attempting various summits, provide incredible insight into each bag's performance. All scores are relative among the bags we tested. Below, we go through each metric and highlight which products stood out during testing and why. We'll also discuss the value of the different options so you can get a sense of what to look for when purchasing on a budget.
Worse Value
Better Value
What's the Best Value?
Prices across the sleeping bags in this lineup are widespread. Why is there such a significant disparity? And what is the difference between them that warrants such a price gap? These bags are built using various types of down or synthetic fill. The wholesale price of down can vary depending on the “power” or loft associated with it. The higher the loft, say 850-fill, the more it costs the manufacturer than the same quantity at a lower weight (like 550-fill). There is also a quality and cost difference associated with the down type. Duck down is typically much cheaper and less lofty (and therefore heavier) than goose down. Costs get passed on to the consumer, so you will generally see this distinction reflected in the price. Highly lofted down bags are also warmer for the carry weight and more compressible, meaning more expensive bags often score higher in our tests.
If you are looking for a bag that performs well but does not cost as much as the Egret, you must sacrifice fill power, compressibility, weight, or some combination of these factors. For example, NEMO Tempo 20 costs comparatively little and does well across most tests. Still, it is heavier, less warm, and less compressible because of its substantial loft, fully post-consumer recycled synthetic materials, as well as other key features for comfort. Its application for longer, faster, or lighter adventures is more limited than the Egret, but it will best fulfill your needs while car camping, on an extended river trip, or any activity where you're not counting every ounce of gear that goes into your backpack.
We love the Nemo Tempo 20 for its budget-friendly synthetic construction that mimics the loft and comfort of down. Credit: Trish Matheny
If you're interested in an affordable down sleeping bag, we recommend the Kelty Cosmic Down 20. This 550-fill hydrophobic duck down construction doesn't offer the lightest weight nor the most packable construction, but its affordability is potentially a worthy trade-off for seasoned adventurers and those new to backpacking and sleeping in the great outdoors.
The Kelty Cosmic Down 20 is a great choice for those seeking the luxury and comfort of down without the crazy price tag. Credit: Trish Matheny
For a little extra cost, the REI Magma 15 is a much lighter, more packable, and highly customizable option that offers excellent warmth and feels smooth and comfortable against our skin.
The REI Magma is our favorite bag for size inclusivity due to the nine different sizing configurations that allow you to better customize the fit for a cozy night of sleep. Credit: Trish Matheny
In our review, you'll see references to EN ratings or European Norms that aim to standardize warmth ratings for sleeping bags. While there are technically four EN ratings, our review primarily focuses on “EN Comfort” which is the temperature most females can sleep comfortably in.
You'll also see us reference denier, or D, that is a measurement of individual fabric specifically referencing the sleeping bag's outer shell, while comparing the overall weight against the durability of the design. Smaller numbers are indicative of more delicate materials (for example: 10D) while higher numbers are indicative of sturdy and lasting constructions (for example: 50D)
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Warmth
Most bags in this review, except for the Feathered Friends Egret and the Western Mountaineering AlpinLite, have been EN-tested for their warmth rating. The EN rating can serve as a rule of thumb for deciding which bag you should use for a particular season, and it makes it easier to compare between bags that have this rating. That said, during our tests, whether or not a bag had an EN rating was not a huge factor in determining its actual warmth. Instead, we compared these bags side-by-side in similar conditions to determine warmth. We found that even some with the same EN rating differed in warmth because of the fit and additional features like neck baffles. Consider a winter down sleeping bag if you want something to take winter camping on high-altitude expeditions.
Things to consider when evaluating a bag's warmth are the loft, fit, and insulation location. Bags with higher fill power and more ounces of down fill will generally be the warmest. Of all the sleeping bag designs we tested, the Western Mountaineering AlpinLite stands apart from the rest thanks to a high loft and 850+ goose down fill. The “short” length was perfect for our 5'6" lead tester, who appreciated the snug fit, a substantial collar around the neck for extra warmth and comfort, and a baffle the length of the zipper, which helped eliminate any cold air drafts. If you find the extra space in the chest of this unisex design a little too spacious, this can be reduced by wearing a puffy jacket at night.
The Western Mountaineering AlpinLite features a high loft, goose down fill construction that is one of the coziest and warmest bags that we tested. Credit: Trish Matheny
Regarding overall loft, the Egret outshines most of the bags we tested, thanks to the 950+ fill power and 17.4 ounces of super-lofty goose down. That being said, our 5'6" lead tester found herself right in between the two women's specific sizes, a size small (5'3") or a size medium (5'9"). This bag also features generous sizing in the hips, plus a shallow hood. While recognizing that the sizing may be perfect for some bodies, our test team found the extra space of the size medium fit created an uncomfortable amount of draft inside the bag, thereby reducing the warmth overall and detracting from a good night's sleep. After spending one month on a climbing expedition in Chile with the bag, often open bivying below the stars, we also couldn't help but notice the toll that the humid environment took on the high-loft design, which felt like it wasn't generating as much warmth towards the end of the trip.
The Egret along with a very intense sunny aspect made sleeping in after a big objective nearly impossible. Without the heat of this sun, our lead tester (5'6") found herself in the middle of the offered sizes which created some cold drafts inside the bag near her hips. Hopefully you fit the Feathered Friends sizing so you can maximize the warmth. Credit: Paddy O'Mara
A proper fit is essential when shopping for your next sleeping bag. If your bag is too large (like our experience with the Egret), your body must work harder to warm up the extra air-filled space. We found the Mountain Hardwear Phantom 15 fit most of our testers very well, with enough wiggle room to wear a few extra layers when it got below freezing, but not so much spare room for cold air to make itself at home. The slim-fitting mummy-style bag is one of the most compelling arguments we can make to purchase a women's specific bag or, in the case of the Phantom, a unisex size small. Although the Phantom is minimally designed to save on weight, the bag features a four-chamber hood, full neck collar, and a baffle that extends the length of the zipper to increase comfort and prevent drafts. So, while the Phantom doesn't feature the highest down fill, the fit and strategically placed baffles made a huge difference in its overall warmth rating.
The baffle that is sewn along the zipper of the Mountain Hardwear Phantom 15 helps limit any cold air from entering the interior. Credit: Trish Matheny
The REI Magma 15 is a great choice for car campers or backcountry enthusiasts who are after a more custom fit to maximize warmth, further eliminate drafts, and remove any excess weight from your kit. The 850-fill-power water-resistant goose down features a high loft, while the neck baffle, as well as the baffle that extends along the main zipper, helps keep cold air out of the interior of the design.
The REI Magma 15 features blue-sign approved 850-fill-power water-resistant goose down, insulated “yoke” collar around the neck, and a main zipper baffle to reduce draft. The custom fit choices also reduce draft by shaping the bag to your body's measurements. Credit: Trish Matheny
More women's products are entering the market with a wide or adjustable fit, like the Nemo Disco 15. These bags will be colder for smaller folks because their body has more internal space to heat up. Draft collars, like the one on the AlpinLite, block cold drafts from entering and help retain body heat inside the sleeping bags.
We tested these bags to the margins of each season from early spring to late fall when the snow started falling. Credit: Jessica Haist
As women are known to sleep colder, manufacturers are putting extra insulation into their women's models — often in the foot box for our cold feet. The Cat's Meow has most of its insulation on the top of the bag where it won't be compressed underneath you, and the Egret and AlpinLite both have continuous baffles that allow you to move all the down on top of you for extra cold nights (or beneath you on warm nights).
Another women's specific model that includes additional insulation is the Kelty Cosmic Down 20. This slim-fitting design features 550 fill-power-hydrophobic duck down along with a women's specific cut that includes narrow shoulders, shorter torso, roomier hips, increased insulation in the footbox to guarantee a cozy night's sleep down to cooler temperatures that hover around or just above freezing.
The Kelty Cosmic Down 20 is a great sleeping bag for cooler temperatures thanks to the women's specific fit, strategically placed baffles, and extra insulation. Credit: Trish Matheny
As the EN rating system gains popularity and becomes the industry standard, we've noticed a trend in manufacturers naming their bags deceivingly with numbers that reflect the “limit” rating versus the “comfort” rating - we want to use a bag at its comfort level, not its limit! For instance, a sleeping bag can have an EN comfort rating of 32 degrees Fahrenheit despite the 20-degree designation in the name — that's a pretty big difference, and we would not take the that bag out with forecasts of 20°F. It feels a little misleading, but we think this is a gentle reminder always to double-check what the numerical qualifier on a sleeping bag actually means when shopping for a new one.
Sleeping bag designs like the NEMO Tempo 20 provide the loft and warmth we'd expect from a down-filled sleeping bag. Although the draft collar looks a little silly, it adds a ton of warmth and coziness when tucked inside the hood. The unique spoon shape fit features ample space in the elbows and knees that's great for side sleepers, just be aware that this generous spacing can also reduce the warmth provided by the Zerofiber 650 synthetic fill.
The Nemo Tempo 20 features a comfort rating around 23F which was our experience, anything less than 20 and we'd want more insulation. Credit: Trish Matheny
When planning your backpacking kit, one thing to consider is choosing a sleeping pad that will add warmth, especially if your bag does not have insulation on the underside. The higher the “R-value,” the more the pad will insulate you from the ground and help you stay warm. Check out our sleeping pad review for women for our favorites.
Weight
No matter who you are, all advantages are welcome when it comes to reducing pack weight on a long overnight trek. No backpacker wants to add extra weight to their pack if unnecessary; we all want a sleeping bag with the greatest weight-to-warmth ratio and no extra material. Of course, this metric shouldn't be a deciding factor if you are looking for a car-camping bag. The weight of a bag is the sum of its fill, shell materials, and added features.
Over the past few years, we've noticed that many manufacturers are labeling their products as “ultralight.” We think this word is overused, and none of the bags in this review are what we consider to be truly ultralight. Synthetic insulation is typically denser, as is down insulation with a lower fill power, since you need a higher amount to achieve the same warmth. A lightweight shell material will lighten up your bag, but will generally be less durable. Bags with sleeping pad sleeves tend to be heavier, even without insulation in the back, because this material is usually heavier than insulation. Features such as double zippers and pockets add weight, so deciding which amenities are important to you before purchasing anything is helpful.
The Neutrino and Egret are very light at 1.75 and 1.72 pounds due to their high fill power down (800/950), lightweight shell materials, and streamlined features. The Western Mountaineering AlpinLite is another lightweight design that's perfect for packing into the mountains for extended trips. At 1.85 pounds for the short construction as well as a highly compressible yet lofty design, this bag brings luxury into the backcountry. A little heavier is the Phantom 15, but it remains very compressible, and it's difficult for us to notice the extra few ounces of weight. The Cat's Meow and Get Down have half-length zippers that contribute to some weight savings.
The Egret is a lightweight down construction that weighs only 1.72 lbs (size medium) making it a great choice for our backcountry bivouac in Chile. Credit: Trish Matheny
Options that strike a good balance are the REI Magma 15 and the Big Agnes Torchlight EXP 20. The Magma is a highly versatile 850 FP down sleeping bag with the ability to customize to the size of your preference. Although somewhat basic, it does include a neck baffle, a small storage pocket, and extra insulation in the spacious footbox. The Torchlight is a highly featured 650 FP down sleeping bag that's perfect for ladies who tend to move a lot in their sleep. The features include expandable panels to increase space inside the bag, a sleeping pad attachment, as well as a pillow sleeve. All these features increase the weight, but not by much. We would still pack this bag into the mountains for a longer trip.
The Magma 15 weighs 2.36 pounds for a medium, narrow size which isn't quite a dealbreaker for backcountry travel, although there are lighter options available. Credit: Trish Matheny
If car camping is your thing and you're just after a super warm and comfortable design, we love the NEMO Tempo 20 Synthetic. The Tempo is less expensive and features ample space inside, making it perfect for side sleepers and those who like to starfish in their sleeping bag. If this option sounds like something you're after, the Nemo Disco, with its many features and roomy cut, is another good choice. Another way to lighten and tighten your load is to find a lightweight compression sack, as the included stuff sacks can be heavy and bulky.
While the NEMO Tempo 20 is one of the heaviest and bulkiest designs that we tested, the affordable synthetic bag mimics the loft and coziness of down, and comes with a compression sack that further reduces the size of the bag, creating more space for essentials in your car or backpack. Credit: Trish Matheny
Remember, every ounce you can shave off your pack saves you some suffering down the trail. Ounces equal pounds, and pounds equal pain over a long trip.
Weighing only 1.85 pounds, the AlpinLite is one of the lightest bags that we tested yet doesn't sacrifice any warmth for those who fit into the uni-sex “short” sizing. Credit: Trish Matheny
Comfort
You want a good night's sleep after working hard during the day. The most important factors affecting comfort in these bags are the size, shape, and liner materials.
After many nights of evaluating bags, we found that comfort directly correlates with shape and size. Often, the roomier the model is, the more comfortable it feels. Unfortunately, these bags are less warm than tighter-fitting bags, as body heat is wasted filling up the “dead” space. Bags like the Western Mountaineering AlpinLite offer a “short” unisex option that fits well and provides a more spacious version of the traditional mummy-style shape. We found the length perfect, while the chest had more space. While the substantial and cozy neck baffle greatly reduced the draft, wearing a puffy jacket to bed is also helpful, depending on your preferences and body shape.
The high loft of the Western Mountaineering AlpinLite's 850+ goose down fill along with a substantial neck collar and additional baffles along the zipper created one of the most comfortable designs we had the pleasure of sleeping in. Credit: Trish Matheny
While the Phantom 15 does feature a slim-fitting mummy-style design, we found the soft and plush 15 denier nylon lining to be cozy and quiet when we moved around to get comfortable. The baffle neck collar and baffle along the length of the zipper create a luxurious and tucked-in space for you to get a good night's sleep.
Speaking of being tucked in, the draft collar on the NEMO Tempo 20 was especially cozy, while the unique spoon shape fit was the perfect amount of interior space for our testers who enjoy sleeping on their sides or find themselves rotating positions a lot during the night. The heavyweight Tempo design also features a high loft that simulates the feel of down while maintaining loft and warmth even in wet conditions. The jersey knit pillow sleeve fabric also feels super cozy next to your skin.
The Nemo Tempo 20 features a super cozy construction complete with soft jersey knit pillow sleeve, a large neck baffle, and additional baffle along the hood for a tucked in feel. Credit: Trish Matheny
The Egret also provides comfort within the 950+ goose down construction. The sizing is generous, providing more space in the hips and enough room for your feet to move around. The only drawback was the noisy, Pertex Endurance UL material, which can keep your climbing partner awake should you adjust your body's position frequently during the night.
Open bivies don't get much more comfortable than this, the Egret features a lofty 950+ fill goose down that's specifically designed for a woman's shape. Credit: Paddy O'Mara
The REI Magma 15 is a more affordable down sleeping bag that exceeded our expectations thanks to its 850-fill-power water-resistant goose down that maintains high loft after lots of compression, along with silky smooth recycled interior. The neck baffle is a unique design that requires some adjustment if you move a lot in your sleep, but when you get it in the right position, it's super cozy. The Magma is also unique in that the design can be configured to fit the shape of your body type. It's available in nine different configurations that allow you to customize the height, length, and width so there's no extra space for cold air to collect, nor any extra weight to pack on your back.
The REI Magma 15 is a lofty and cozy construction that surprised us with its exceptional comfort thanks to its custom fit and silky smooth fabric. Credit: Trish Matheny
Lately, manufacturers have been going to great lengths to figure out how to make the traditional mummy design more comfortable. The Mountain Hardwear Bishop Pass 15 has a “Performance Plus” mummy shape that is roomier than a traditional one. Many bags also have added features for comfort, like the expansion panels on the Big Agnes Torchlight EXP 20 that you can zip open or closed to tailor the size of the bag to you, or NEMO Disco 15 that allow you to sleep in a corkscrew position with a knee up. The Disco also features a unique ventilation design that the manufacturer refers to as “gills” which allow you to release body heat from the interior without allowing cold air into the bag. While we wish the Disco provided a more lofty design, if custom ventilation is your thing, the Disco is worth looking into.
The Big Agnes Torchlight EXP 20 design features an exterior pillow barn that cinches down your pillow or down jacket, and is just one of the key features that enhance the overall comfort of the down-filled construction. Credit: Trish Matheny
Shell and liner materials are also essential factors for comfort. We love the soft, silky material of the Rab Neutrino and the Kelty Cosmic Down 20 against our skin. The Cosmic Down also features a women's specific fit that features a narrow fit in the shoulders, a shorter torso, more space in the hips, as well as additional insulation in the footbox and upper body for a warmer night's sleep.
Although the Kelty Cosmic Down 20 isn't the most lofty down construction due to its minimal fill power, it's women's specific fit and features increase comfort. Credit: Trish Matheny
Packed Size
When it comes to your sleeping kit, size matters. This is especially important if you plan to carry everything on your back for multiple days on end. You will not only want to focus on the bag's weight but also how small the bag compresses to make space inside your pack or haul bag for other essential items. A lightweight and compressed backpack also helps to provide better balance and maneuverability in technical mountain terrain.
It's a general rule that, per ounce of insulation fill, down fill is much more compressible than synthetic insulation. The down-filled Rab Neutrino has the smallest packed size by far and has only 15 ounces or less of down fill. This means there is less volume to compress, so it's less warm than much of the competition. In comparison, the Western Mountaineering AlpinLite has 19 ounces of 850+ down fill, and the Mountain Hardwear Phantom 15 has 20 ounces of 800 down fill. Yet, in both cases, the bags compress to a similar package size as the Neutrino while providing far more loft and warmth overall. The Feathered Friends Egret UL 20 is another with an impressive weight-to-warmth ratio (950+ down fill), although it does not slim down quite as well for packing.
The Phantom 15 includes a storage sack and compression bag that easily pack down in side, allowing space for other essentials inside your pack. Credit: Trish Matheny
The North Face Cat's Meow proved less difficult to pack than we might have expected given its warmth, yet it still ended up among the largest of the down bags we tested. The final packed size of these two bags improves if you put the compression sack that comes with your purchase to work. Note: All of the products in this review come with a stuff sack, but most are not compression sacks. We generally prefer compression sacks for squeezing the bags into the smallest bundles possible. A few of those that include compression sacks are the Mountain Hardwear Phantom, NEMO Tempo 20, and the NEMO Disco. That said, we found the cube-style sacks on the NEMO's difficult to fit into our backpacks. Instead, the storage cube is great for a gear closet, a river raft, or packing up your rig for a camping trip near your vehicle.
The Nemo Tempo includes a Stow-or-Go hybrid storage cube with two separate zippers used to compress it smaller or be zipped open to decompress. The Nemo Disco features a storage cube and separate compression sack.
When you purchase a new bag, consider getting a separate compression sack that will reduce your bag to the smallest size possible.
Remember that compressing your down bag shortens its lifespan, so most manufacturers include a large cotton or mesh storage sack with your purchase. Unfortunately, Kelty does not provide one for the Cosmic Down Ultra. Always store your bag as uncompressed as possible to ensure the longest lifespan.
We appreciate bags that include a compression sack so we can pack them down small and free up space in our packs. Credit: Jessica Haist
Features
We evaluated shell material, zippers, pockets, baffles, drawstrings, sleeping pad sleeves, and other added features for this metric. We also note what features are necessary and useful, rather than superfluous features that make the bags heavier or more awkward. We like the streamlined features of the Mountain Hardwear Phantom 15 because they are designed with weight savings in mind. The bag is soft, made of lightweight fabric, and has high-quality 800 fill with no other frills, making this our favorite simple-featured bag designed to perform in the mountains. The AlpinLite and Egret are also very streamlined.
The anti-snag zipper adds a little extra weight in exchange for convenience and durability. Credit: Trish Matheny
We can't talk about sleeping bag design features without highlighting the Big Agnes Torchlight EXP 20, which offers seemingly any feature you can think of. From expandable side panels for a more spacious interior to an exterior sleeve for your pillow or the ability to fasten your sleeping bag and pad into one unit, this bag takes the cake for features and versatility.
From pillow sleeves to pad attachments, the Torchlight has all the features to meet your specific needs
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The NEMO Disco design includes unique ventilation panels, which NEMO calls “gills,” that run along the chest and help you fine-tune or customize your temperature control based on current conditions. While the design is definitely unique, we found ourselves simply preferring to unzip the main zipper and toss a leg outside the bag before we used the ventilation panels.
The Nemo Disco includes very unique ventilation “gills” that help you customize your experience based on current conditions. Credit: Trish Matheny
It's worth giving Nemo a sustainability shout-out as their Endless Promise collection that includes both the Tempo 20 and Disco 15 features sleeping bag designs that are fully recyclable at the end of their life. And, each sleeping bag is constructed from entirely post-consumer recycled materials.
The Nemo designs feature recycled materials that are completely recyclable at the end of their life. Simply return the bag to Nemo and they'll take it from there. Credit: Trish Matheny
Almost every down bag in this review comes with some form of hydrophobic down. It seems that manufacturers are on a level playing field in this department. Each company has a proprietary hydrophobic down; Mountain Hardwear has Q Shield, Rab uses Nikwax, etc.
Down-filled constructions will feature durable water resistant (DWR) treatments that prevent the down from being soaked during inclement weather although they do not typically withstand substantial rain, thereby reducing their overall warmth when wet. If you find yourself camping regularly in a rainy environment, a synthetic bag will provide the best performance. Credit: Trish Matheny
The effectiveness of hydrophobic down is difficult to test. Folks attempting to demonstrate the effectiveness of manufacturers' treatments to the down have tackled the task in various ways, from getting in the shower to jumping into frozen lakes. While some tests may look promising for realistically gauging the performance of the treated down fill, skepticism still exists about how beneficial such treatment really is. Another consideration is that this coating can add around an ounce to your bag's weight. It may also create potentially harmful chemicals that off-gas while you sleep. When Feathered Friends was asked about why they don't treat their down feathers, here's what they had to say:
"We consciously decided not to treat our down with a water-repellent coating. Although waterproof down has recently become popular in the outdoor industry, we find it compromises the down's effectiveness and longevity while providing little real-world benefit. We also have concerns about the widespread and excessive use of PFCs, which negatively impact the environment. Because we take such pains to source high-quality down and take such pride in the quality of our products, we don't have any plans to use down treatments, and, as far as we know, neither do Western Mountaineering, Arc'teryx, or other purveyors of high-quality down products. However, we use a DWR on all of our fabrics, which should effectively keep out moisture from condensation, ice, or light precipitation."
Anti-snag zippers are all the rage, the Egret features a substantial #5 YKK two-way zipper that is easy to use and built to last. Credit: Trish Matheny
A trend we've noticed recently is burly “anti-snag” zippers and other extreme measures taken so zippers do not get caught on the bags' shell material. We prefer these zipper pulls to having stiff material along the zipper line to prevent snagging.
We've spent hundreds of nights in the backcountry testing out these bags for you. Credit: Ian McEleney
How to Choose a Women's Sleeping Bag
Generally speaking, women sleep much colder than men, especially outdoors. Our unique female anatomy distributes our body fat more evenly, so we typically have a layer of fat that men do not. While this allows us to conserve body heat better, there is a downside: our cores tend to pull heat from our extremities to protect the temperature and function of more important internal organs. Metabolic differences can also be key in women's bodies running colder than men's. For these reasons, we recommend considering a gender-specific sleeping bag, especially if you are shorter and/or tend to run cold. Women's bags will generally be designed to account for these functional needs.
Do you prefer a down or synthetic sleeping bag? A women's specific fit or a “short” uni-sex option? Our brief article below is here to help. Credit: Gus Landefeld
Female Specific Features
Three main design adjustments are accounted for in a women's specific sleeping bag: a shorter length and fit that accommodates smaller female shape with curves, more insulation per square inch, and extra insulation in key locations where body heat tends to be lost (near the feet, around the neck, and the core). We highly recommend selecting a bag tailored to your height and body shape to maximize all features. Some bags we tested are only available in short or medium lengths, which left our testers in between — either too small or too big, with pockets of cold air significantly reducing the bag's warmth. Anyone who tends to run cold should consider purchasing a bag with additional insulation per square inch or simply more insulation overall to help maintain their body's temperature while sedentary overnight.
Women's specific bags will often have unique design features that cater to our physiology in order to maximize warmth. Credit: Ian McEleney
Down or Synthetic?
You'll notice that our review includes various sleeping bag materials and fills. Typically, down-filled sleeping bags offer the most loft and luxurious feel and extra warmth. Synthetic bags are often heavier and bulkier, putting them at a significant disadvantage. The caveat to a down sleeping bag? Wet and humid environments can damage the loft and reduce the bag's warmth and overall performance (although most feature treatments are meant to prevent this). For this reason, synthetic bags are often preferred for wet and humid climates or frontcountry camping where weight is not an issue. Down sleeping bags will particularly shine whenever you aim to travel fast and light in a dry climate.
Down sleeping bags feature a ton of loft with along with a coating to protect the down from wet and humid climates. Credit: Trish Matheny
What Activities Will You Pursue?
Deciding what activities you'll be doing is another key factor in determining the best sleeping bag to meet your specific needs. We tested several styles and designs to provide better information about what's available. From ultralights built with simple designs that maximize warmth at limited weight to heavy-duty sleeping bags perfect for cozy nights in a campground tent or the back of a truck, and all of your backpacking needs — we've tried them all. We tested options well-suited for side sleepers, considered the needs of women who move around a lot in their sleep, and examined those featuring a “barn” to keep your pillow in place. We even looked at bags with an extra zipper to expand or contract the design for better thermoregulation based on conditions. There are a ton of options out there, so it's helpful to hone in on what will make you most comfortable on your next overnight outside.
Are you planning an open bivy high in the mountains or car camping near the trailhead? Credit: Paddy O'Mara
Other Notable Sleeping Bag Designs
Rab Neutrino 400: this 800 FP European Goose Down design features a women's specific cut along with silky smooth interior for ample warmth and comfort within a reasonably priced down construction.
The North Face Cat's Meow: this affordable synthetic construction is perfect for ladies seeking a budget-friendly construction that's relatively lightweight and includes a stuff sack and compression sack for better packability.
A sleeping bag is arguably one of the most important pieces in your camping gear repertoire, and when you're out there on the trails, pair your bag with one of our testers' favorite women's sleeping pads. If you're a taller person looking for a wider variety of backpacking sleeping bags, you should check out our men's/all-gender review on backpacking sleeping bags. We've also tested bags suited for a casual car camping trip that are less technical (and usually more affordable).
Conclusion
With so many women's products saturating the market, we've weeded through a broad assortment of the most compelling options, sifting through the industry hype to help you determine what works best for your needs. We hope you feel empowered to select just the right sleeping bag for your upcoming adventures.
Whether you're going on a river trip or planning a backcountry bivy under the stars, we hope our testing notes and perspectives help you select the best option for you. Credit: Trish Matheny
