Arc'teryx Atom Hoody - Women's Review

The Arc'teryx Atom Hoody is a lightweight, comfortable synthetic jacket that works just as well as a standalone layer as it does beneath a shell. It has a soft nylon exterior, with strategically placed stretchy-fleece side panels. The relaxed-athletic cut and raglan sleeves allow plenty of freedom of movement. The helmet-compatible hood has an adjustable drawcord, while two hem adjustments help seal out cold air or let you hike the hem up. Two fleece-lined zippered hand pockets and an internal chest pocket provide plenty of storage for small essentials. The jacket also packs away into its own pocket if you want to pack it in your backpack or suitcase.

Warmth

The Atom Hoody is surprisingly warm for how thin and lightweight it feels. The synthetic insulation provides a nice amount of warmth without bulk. A slight drop hem and a high chin guard provide extra protection in key areas where cold air tends to slip in. Two drawcord adjustments at the hem make it easy to seal out drafts, and the stretchy knit cuffs fit snugly around the wrists. Though it's warmer than you'd expect from such a thin jacket, it isn't enough to wear on its own during the coldest winter days.

The Atom has a generously sized hood that easily fits over a beanie or most climbing helmets. The high collar provides good coverage around the neck and chin, even when you're wearing the hood down. We also appreciate the soft fleece lining inside the hand pockets, which makes them a nice place to warm up cold fingers. The relaxed-athletic shape and smooth interior lining make it easy to slide over all kinds of different fleeces, base layers, and sweaters, with enough room to move freely. Its low-profile construction makes it easy to pull a waterproof shell over the top, making it one of our top choices for a winter layering system. The malleable, soft exterior fabric moves with you, but it doesn't seal out as much frigid air or gusts as thicker ripstop nylon options.

Comfort

Comfort is the main reason we keep reaching for the Atom Hoody. It has a soft, flexible feel that's much closer to wearing a sweatshirt than a traditional insulated jacket. The fabric moves easily with your body, and the low-profile insulation doesn't bunch up or feel bulky underneath other layers. We especially like the stretchy cuffs, which are snug enough to stay in place without squeezing your wrists. The hem provides good coverage, and the two drawcord adjustments let you change the fit depending on what you're wearing underneath. The hood also has an adjustment in the back, so you can tighten it down close to your head when you're not wearing a helmet or hat.

One of our favorite things about the Atom is its stretchy side panels, which run from the underarms down to the hem. These panels make a noticeable difference when reaching overhead, bending, or moving around, especially compared to jackets with stiffer fabrics and more restrictive stitching. The soft fleece backing feels nice against thinner layers, and the smooth exterior makes it easy to wear underneath a shell without everything getting bunched up. The raglan sleeves allow for easy reaching without the rest of the jacket moving or exposing any skin. Whether we're climbing, hiking, skiing, or wearing it around town, the Atom is the most comfortable jacket in our lineup.

Weather Resistance

The Atom Hoody might feel too soft to fend off any rain or wind, but it does a better job of blocking out the weather than you might expect. Its feather-light nylon exterior provides a decent barrier against wind, while the full-length zipper has a protective flap behind it to keep drafts from sneaking through. Even the hand pockets have small fabric overhangs that help protect the zippers from moisture. The hood has a slightly stiffened brim that offers some protection from precipitation.

We wore the Atom through snow, light rain, and plenty of windy weather, and found that it handled most passing storms without much trouble. Water initially beads up on the exterior, although it eventually soaks into the face fabric. The lack of quilted baffles means there are fewer seams where moisture can work its way inside. The snug cuffs also help keep out wind and light precipitation. However, the stretchy fleece panels along the sides are much less protective than the rest of the jacket. Cold gusts sneak through them, and they absorb moisture more easily. In heavy rain, the Atom's exterior will eventually wet out, and some moisture may make it through the fleece panels in a real downpour.

Everyday Versatility

We reached for the Arc'teryx Atom for almost every situation, from hiking and climbing to running errands and heading out for dinner. The soft, stretchy construction makes it comfortable enough to wear all day, while the streamlined fit looks just as good around town as it does in the mountains. We appreciate that it doesn't feel or look like a traditional puffy jacket, making it easy to wear with everything from climbing pants to a jean skirt. The lightweight insulation provides just enough warmth for cool mornings and evenings, while the breathable side panels keep it from feeling too hot when you're moving around. It's thin enough to fit comfortably under a rain shell when the weather turns.

Unlike many of the other jackets in our lineup, the Atom doesn't look overly technical, yet is still has a high-level technical performance. It does reach limitations once temperatures dip into the teens, unless you're moving. But if you want a jacket that you can wear for most of the year, this jacket gives you more versatility for your money.

Breathability

The Atom Hoody is one of our favorite jackets for outdoor activities. Its stretchy fleece side panels allow excess heat to escape, making it noticeably more breathable than most fully insulated jackets. We found that it does a good job of keeping us comfortable while hiking uphill, backcountry skiing, climbing, and moving at a steady pace in cooler weather. The sleeves are also stretchy enough to push up your forearms when you need a little extra ventilation.

Of course, the easiest way to cool down is to unzip the front, but we appreciate that the Atom doesn't require constant adjustments to stay comfortable. The breathable side panels help prevent too much heat from building up in the first place, while the insulated front and back still provide plenty of warmth.

Should You Buy the Arc'teryx Atom?

The Arc'teryx Atom Hoody is one of our favorite all-around insulated jackets, especially for anyone who spends a lot of time outdoors. It's soft, comfortable, breathable, and easy to layer, making it a great choice for everything from hiking and climbing to everyday wear. We particularly like how well it works as a midlayer underneath a shell, and it's warm enough to wear on its own during milder fall or spring weather. The biggest downside is the price, and it isn't the best option if you're looking for a thick winter jacket to keep you warm while standing around in freezing temperatures. But if you want one lightweight jacket that can handle a little bit of everything, the Atom is worth the investment.

What Other Women's Insulated Jackets Should You Consider?

If you like the comfort and versatility of the Arc'teryx Atom Hoody but want something a bit warmer and more water-resistant, check out the Patagonia DAS Light Hoody. It has more insulation and a protective exterior, making it a better choice for staying warm during cold, windy conditions (but it's nearly as comfortable). If breathability is your biggest priority, the Cotopaxi Pacaya is another great option.