Arc'teryx Atom Hoody Review

Warmth

3-season jackets like the Atom Hoody, are more versatile, but have to be built with a lighter amount of insulation. We loved its performance in moderate temperatures above the treeline in the summer and fall, but we needed to pair it with more layers below about 45 degrees Fahrenheit. However, if you're one of those cardio nuts that has to keep moving all the time, the more modest warmth of the Atom, by itself, might be perfect for your needs.

In its jacket class, the Atom Hoody has a decent level of warmth, but you'll turn into an ice cube (not the rapper) if you rely on it solely for insulation in the depths of winter. During early fall testing, we took this jacket to a remote basin in the Sierra Nevada and kept it on all day on a shady alpine wall, grateful for its heat retention as we squirmed up granite chimneys, where the rock was arctic to the touch.

When we needed to batten down the hatches, the hem and hood could be quickly cinched down. This prevented unwanted heat leaks and stretched the temperature comfort range of the Atom.

Comfort

The Arc'teryx Atom Hoody was so comfy that our testers began wearing it every day, even indoors in cooler temperatures. Our friends and family were on the verge of having an intervention, demanding that we mix up our outfits. We settled for washing it more regularly, and still wore it several days a week.

This layer wowed our team with its fleece fabric under the arms, and the nylon in the rest of the jacket even felt good with just a T-shirt underneath. The Atom has a fantastic range of motion that kept rock climbers headed upward, skiers hitting moguls with ease, and even those of us stuck cleaning our gutters in the fall were happy with the Atom's range of motion.

Weather Resistance

The Atom does not replace your rain jacket, and should generally be only worn as your outermost layer if conditions are dry. Having said that, we got caught in a few rainstorms (intentionally for the sake of testing? we'll never say), and stayed dry under the Atom as long as the storm was short or never strengthened beyond a drizzle.

During testing, we wore the Atom for most of the day on a classic alpine climb, and were surprised by a 20-minute hail storm on the summit. Despite modern-day weather forecasting, even our team of outdoor experts get surprised on a regular basis. For these quick storms that seemingly come out of nowhere, the Atom kept us protected well enough. We also loved the wind resistance, with the more shell-esque exterior emboldening us on exposed ridges.

Breathability

The Arc'teryx Atom Hoody is an impressively breathable insulated jacket, and will keep you from getting as sweaty as Sylvester Stallone in any of the Rocky films. Having said that, this still will need to be shed if you're huffing it uphill in warmer months, and we often find ourselves in our base layers in those settings regardless.

The circular knit fleece under the arms of the Arc'teryx Atom Hoody vented so well we got BO complaints from our mountain partners. The face fabric of the Atom does trap a bit more heat, but it has a thin enough construction that we didn't overheat in cooler seasons, whether playing ice hockey on a frozen lake or climbing alpine rock above treeline.

Everyday Versatility

This is one very clean insulated jacket that'll keep you looking “mountain chic” strolling from the trail to the brewery. It's also a packable layer, so you can squeeze it into a carry-on bag or an overnight backpack that has a few too many “just in case” items. Simply put, this is a versatile jacket, though keep in mind what colors will work best for your needs. We tested the latest version of the Atom in a bright yellow. While we love a good pop of color, it could be an eyesore for some compared to Arc'teryx's more muted color offerings.

The Arc'teryx Atom Hoody weighs just 12.8 ounces, making it a fairly low-weight jacket, especially considering it offers a decent amount of warmth. Why do you care? Simply put, a lighter layer like this can be brought for more activities, and it can be layered easily in wet or cold conditions. Arc'teryx did a phenomenal job making this layer roomy enough to accommodate a fleece or thick sweater underneath it, without being too bulky when putting more jackets over the Atom.

Should You Buy the Arc'teryx Atom Hoody?

If this layer is in your budget and you need an insulated jacket, quit fussing around and buy the Atom. Its easy-to-layer design and lower weight make it useful for summertime backpacking just as well as mid-winter resort skiing, but if you want stand-alone warmth from your next jacket, go for something heavier. Just remember you can't have it all; a warmer layer than the Atom won't breathe as well and won't be as useful in the spring and fall seasons.

What Other Insulated Jackets Should You Consider?