Bottom Line
From Arc’teryx’s enduring Atom line comes the SV: the most insulated jacket in the Atom family. Standing for Severe Weather, the SV’s cold-weather performance and ability to retain warmth even when wet make it one of our favorite winter jackets.
Insulated with 120 grams of Coreloft polyester insulation, the Atom SV provides excellent warmth across various temperatures. Tested in Alaska’s cold, damp fall and frigid winter conditions down to single digits, the Atom SV is a versatile insulator, ideal for three-season use. Its synthetic insulation can retain heat even when wet, and the lightweight stretch nylon shell provides sufficient weather resistance for dry snow or light rain. Weighing just 17.3 ounces, it is extremely lightweight, making it a perfect layer for moving quickly and unencumbered in the mountains.
While extremely lightweight, the Atom SV sacrifices weather and abrasion resistance to maintain its featherweight stats. The nylon shell, although DWR finished, offers only minimal weather protection. It’s suitable for dry snow or light rain, but don’t rely on the Atom SV to keep you dry in heavy or wet snow.
The 30-denier shell, while allowing the jacket to be ultralight, is less durable and scratch-resistant than others we tested. Due to these small limitations, the Atom SV is best worn under a shell or when you don’t expect heavy rain or contact with rocks and brush. Anyone wanting a jacket that insulates when wet and wicks moisture during high-output activities will find the Atom SV a good choice.
How We Tested
The Arc’teryx Atom SV was tested in a variety of late fall and winter conditions over three months. From the damp cold of late fall to single-digit temperatures of an Alaskan winter, the Atom SV was put through different situations. Worn during over 30 hours of activities, the Atom SV was carefully evaluated during skis, hikes, and cold-weather runs to thoroughly assess its performance across various conditions and activities.
Quick Specs
Arc’teryx Atom SV
Best Lightweight Insulator
CleverHiker Rating: 4.7/5.0
Price: $350
Weight: 1 lb. 1.3 oz.
Insulation: Coreloft 120g polyester
Pros
- Lightweight
- Wicks moisture
- Packable
- Warm hood
- Insulates when wet
Cons
- Not as weather-resistant
- Outer shell scratches easily
Warmth
The Arc’teryx Atom SV is insulated with 120 grams of Coreloft polyester insulation. While not the heaviest insulated jacket in our lineup, we found that this jacket strikes a great middle ground. Tested in damp fall weather in the forties and in cold, dry winter temperatures in the single digits, the Atom SV is best suited for moderately cold conditions. It is comfortable at rest down to the low twenties and during activity down to around ten degrees.
The Atom SV offers versatility as a winter jacket or a three-season option in colder climates. While it isn’t ideal for sitting in cold temperatures for long periods, it works well as an insulating layer for active adventures where increased body heat helps keep you warm. The synthetic insulation also has the benefit of insulating even when wet, which made it a favorite during testing in coastal Alaska’s damp and cold conditions climate.
Weather Resistance
The Atom SV has moderate to low weather resistance, consistent with its intended use. It is not designed to be a standalone layer in heavy rain or snow; instead, it’s best paired with a shell for optimal weather protection. The outer shell is made from 30-denier microripstop fabric.
Treated with a durable water repellent finish, it can repel dry snow and light rain but will absorb water in sleet and heavier rain. While we wouldn’t recommend using this jacket as your only option in severe weather, it provides sufficient weather resistance for light precipitation and dries very quickly for quick, passing rain showers storms.
Comfort & Functionality
The Atom SV is a highly comfortable and well-designed jacket. With a slightly relaxed fit, it balances performance and comfort. Thermo-mapped for optimal performance during high-output activity, the full-length stretch side panels maximize breathability and improve mobility during active adventures. It also features stretch-knit cuffs, which are comfortable directly on the skin, help seal in warmth, and fit smoothly under gloves. Fleece-lined hand pockets add extra comfort when bare skin is exposed.
While definitely technical, the Atom SV is casual enough to wear around town but performs best in the mountains during high-output activities. Weighing 17.3 ounces, it’s one of the lightest jackets in our lineup. Whether in a backpack or on your body, it’s hardly noticeable and perfect for moving quickly when weight is a priority
Features
While light on features, the Atom SV’s trim profile is a standout. Easily fitting under a shell, this is a great layer to pair with your favorite outerwear. The helmet is hood-compatible and fully insulated, providing extra warmth and weather protection. A single pull adjusts the hood for a snug fit, helping to block out the cold and elements.
An internal chest pocket is ideal for keeping valuables safe and warm, while two hand pockets offer additional storage. Although it can’t be zipped into its own pockets, the Atom SV is very packable, making it easy to compress into a small space in your backpack for your next alpine trip excursion.
Should You Buy the Arc’teryx Atom SV?
The Arc’teryx Atom SV is a high-quality jacket that comes at a high price. While it may not be as accessible to entry-level hikers, those willing to spend extra will be rewarded with a high-performing, versatile jacket. This ultralight performer is perfect for insulating during high-output activities or in damp climates.
Its Coreloft 120g synthetic insulation stays warm when wet and wicks sweat and moisture away from the body. While heavy enough for all but the coldest temperatures, the Atom SV offers three-season versatility in a very lightweight design. The thin, stretchy 30-denier nylon shell is lightweight but lacks strong weather resistance and can be scratched easily. This jacket is best for those seeking mid-level insulation for active adventures where weight, comfort, and wet-weather warmth are important priority.
What Other Winter Jackets Should You Consider?
Check out our full gear guide for all our favorite winter jackets.
Patagonia DAS Review: Another great synthetic insulated jacket with a slightly longer cut for increased warmth.
Rab Neutrino Pro Review: If you love the classic warmth of down, then the Rab Neutrino Pro is hard to beat.
LL Bean Ultralight 850 Review: The only jacket lighter than the Atom SV, the LL Bean Ultralight 850 is great for moderate temperatures or three-season use.
