REASONS TO BUY
Comfy against the skin
Excellent weight
Nice aesthetics for the town or trail
Improved pilling resistance
REASONS TO AVOID
Lacks a chest pocket
Tighter fit for some
Hood bunches under a helmet
Arc'teryx Kyanite Lightweight Hoody Review
This is a genre-bending fleece you can wear to dinner or on a mountain hike
Credit: Zach Lovell
By Zach Lovell ⋅ Review Editor ⋅ September 30, 2026
RELATED: The Best Fleece Jackets for Men
Our Verdict
Arc'teryx has been making various versions of the Kyanite fleece for nearly a decade, and the latest Kyanite Lightweight Hoody continues to be a favorite for town-to-trail use. This update is much lighter, coming in at 10.8 ounces in a men's medium, and has improved breathability that lets us wear it all adventure long. The Kyanite Lightweight runs slimmer than other versions, though it made it easier to fit a puffy or shell jacket overtop, and we greatly appreciated the improved pilling resistance over past iterations. As long as you aren't needing a relaxed cut or a chest pocket, the Kyanite Lightweight is a great fleece that works just as well on a city street or a ridgeline.
Compare to Similar Products
 This Product
Arc'teryx Kyanite Lightweight Hoody | |||||
|---|---|---|---|---|---|
| Awards |  Runner-Up | Best Overall Fleece Jacket |  Best Breathability for Exercise |  Affordable Fleece for Everyday Wear | Best Value for Tight Budgets |
| Price | $150 List Check REI (on sale!) | $199 List Check Price at REI | $130 List Check Price at Backcountry | $70 List Check Price at REI | $29 List Check Amazon (on sale!) |
Overall Score  |
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| Star Rating | |||||
| Bottom Line | This is a genre-bending fleece you can wear to dinner or on a mountain hike | A versatile fleece that’s inviting against the skin and useful across all four seasons | You’ll be hard-pressed to find this level of breathability in a fleece jacket | A fleece jacket that’s affordable and comfy to wear for casual adventures | If price is your main concern, this fleece offers impressive comfort and mobility |
| Rating Categories | Arc'teryx Kyanite Li... | Patagonia R1 Air Ful... | Rab Ascendor Light H... | REI Co-op Trailmade | Amazon Essentials Fu... |
| Comfort (30%) | |||||
| Warmth (25%) | |||||
| Breathability (20%) | |||||
| Layering Ability (15%) | |||||
| Weight (10%) | |||||
| Specifications | Arc'teryx Kyanite Li... | Patagonia R1 Air Ful... | Rab Ascendor Light H... | REI Co-op Trailmade | Amazon Essentials Fu... |
| Type | Lightweight | Midweight | Lightweight | Midweight | Midweight |
| Main Material | Body: 53% polyester, 38% nylon, 9% elastane | Body: 100% polyester jacquard fleece | 94% polyester, 6% elastane | Body: 100% nylon Accents: LYCRA spandex |
100% polyester |
| Number of Pockets | 2 | 3 | 3 | 4 | 2 |
| Features | Nylon face outer with a brushed polyester interior, 4-way stretch textile | Slim-fit hood, quick drying, off shoulder seams | Helmet compatible hood | Spandex binding along hem, cuff, and collar; double-layer collar | None |
| Measured Weight | 10.8 oz (Size M) | 12.4 oz (Size M) | 10.3 oz (Size M) | 13.0 oz (Size M) | 15.7 oz (Size M) |
| Hood Option | Yes | Yes | Yes | No | No |
Our Analysis and Test Results
The Kyanite Lightweight Hoody is an excellent fleece for outdoor recreation or social hangs, thanks to its breathability and a clean aesthetic. Credit: Zach Lovell
Comfort
Arc'teryx did a great job with the comfort of the Kyanite Lightweight, with a brushed polyester that felt great on our skin. As one tester shared, “In mid-winter, I almost wanted to wear a T-shirt underneath the Kyanite, rather than a long-sleeve base layer, just because it felt good on my arms and neck.” This update has a slimmer fit, but if you like a close-fitting fleece, the cut change might be a plus.
In addition to the Kyanite Lightweight feeling soft against the skin, Arc'teryx uses minimal interior stitching to reduce rubbing. The slim fit gives this fleece a more precise cut, though its high-stretch polyester makes it feel much less restrictive, even with arms crossed or reaching overhead.
We loved the stretch of the Kyanite Lightweight, which made its slim fit cut more mobile. Credit: Zach Lovell
Despite its precise fit, some excess fabric tends to bunch in the stomach and wrist areas. Overall, this bunching didn't significantly affect the layer's comfort, but we sometimes had to smooth out the zipper area when clipping a backpack's hip belt.
While a relatively nitpicky detail, there is some bunching when wearing a hip belt, which you can see on this hiker's left hip. Credit: Zach Lovell
Warmth
As a lighter version of the original Kyanite Hoody, the Kyanite Lightweight isn't the warmest fleece out there. Below about 45 degrees Fahrenheit, we needed to keep moving or add another layer to keep the goosebumps and chills at bay.
The face fabric of the Kyanite Lightweight did make this fleece at leastslightly wind resistant and kept us from adding a layer for quick dog walks or when a hiking trail briefly emerged into a wind-exposed meadow from the woods. In winter temperatures, it still worked well as a close-to-base piece, but we (of course) had to add substantial insulation and weather resistance to our layering system.
Despite the sunny skies, we measured the ambient air temperature at 29 degrees Fahrenheit for this dog walk in the Kyanite Lightweight, which made us keep the walk short. Credit: Zach Lovell
Breathability
This was a standout difference from the Kyanite to the Kyanite Lightweight, with a thinner overall construction making it easier to shed body heat while the heart was pumping as we hoofed it uphill. For resort skiing, this layer also kept us from getting too sweaty on a leg-burning mogul run. If breathability is high on your priority list, this fleece may deserve a spot in your closet.
The Kyanite Lightweight has a brushed interior and a jersey knit exterior that encourages moisture outwards away from the body. Paired with its lighter-weight construction, this is a jacket you can trust in the backcountry to keep you from getting wet from the inside out. The Kyanite Lightweight's breathability also makes it ideal as a closer-to-body layer when used with other jackets in Arctic temperatures, where things can get impressively sweaty when hiking or skiing.
Even hiking up steep hills with a pack, the Kyanite Lightweight breathes well in cooler temperatures. Credit: Zach Lovell
Layering Ability
Overall, the Kyanite Lightweight is a layering-friendly fleece. However, if you've owned a Kyanite fleece in the past, it's important to know this update is not as ideal for layering underneath, given its slimmer fit compared to the old Kyanite's more relaxed cut.
The tighter fit of the Kyanite Lightweight makes it a great piece to wear right against your base layers, then add more insulation or weatherproofing over it. From trimmer mid-weight insulation to baggy down jackets, we had minimal issues with layering as long as we didn't try to stretch it over other jackets.
The Kyanite Lightweight is best worn close to the body, with layers worn over it. Credit: Zach Lovell
The Kyanite Lightweight, and all previous versions, don't work particularly well with climbing helmets. It's too small to stretch over a helmet, yet it bunches too much underneath. If you otherwise like the sound of the Kyanite Lightweight, we simply suggest using an under-helmet beanie to keep your ears warm when using a helmet in cold temperatures. This hood works best when pulled over a hat.
This hood can easily be pulled over a hat, but it doesn't work well over or underneath a helmet. Credit: Zach Lovell
Weight
The aptly named Kyanite Lightweight weighs a scant 10.8 ounces in a men's medium. This is substantially lighter than the classic Kyanite and is easier to justify bringing on a backpacking trip or in your carry-on roller bag for a weekend getaway.
Besides being decently light, the Kyanite Lightweight is also quite packable. It squeezes easily inside a climbing or fishing backpack, and we didn't have much trouble packing it into a daybag for lighter-duty hiking. Fleece jackets in weight classes like this are generally more versatile because they're less cumbersome to bring along.
This offers a much lighter construction than many fleece jackets available today. Credit: Zach Lovell
Should You Buy the Arc'teryx Kyanite Lightweight Hoody?
If you want a fashionable fleece that'll still perform year-round, the Kyanite Lightweight is a good option. It's a lighter-weight layer that has better breathability than the classic Kyanite, though its slimmer fit won't work for everyone. We appreciated the brushed polyester interior for days when we could get away with wearing just a T-shirt underneath, and its stretch kept our upper bodies unrestricted for climbing or fishing.
The Kyanite Lightweight doesn't bat an eye being worn to the coffee shop in a city or drug along for a remote backpacking weekend. Credit: Zach Lovell
What Other Fleece Jackets Should You Consider?
If you want a slightly more relaxed fit, check out the Rab Ascendor Light Hoody, which has even better breathability than the Kyanite Lightweight Hoody and includes a chest pocket, which our testers love to use to keep cell phones warm in the winter. If the price tag of the Kyanite is giving you pause, put some thought into the budget-priced Patagonia Micro D Fleece Pullover, which is one of the lightest models on the market.
—Zach Lovell
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