Arc'teryx Atom LT Hooded Insulated Jacket - Men's

Never leave home without it.

Who needs a multi-tool when you've got the Arc'teryx Men's Atom LT Hooded Insulated Jacket? Well, you don't—though, you might want to bring one along anyway (just in case). More specifically, the designers over at Arc'teryx made the Atom LT versatile enough to handle year-round mountain adventures ranging from climbing to skiing.

The Atom LT is constructed with a durable, breathable, and lightweight Tyono exterior, while the DWR treatment fends off light rainfall—meaning you stay relatively dry no matter what Mother Nature throws your way. To bolster its adaptability, the Atom LT is equipped with gusseted underarms and Polartec Power Stretch side panels to ensure an unimpeded range of motion whether you're wearing it as a midlayer or an external shell. Perhaps most importantly, though, is the Atom LT's synthetic Coreloft insulation. This synthetic insulation not only retains warmth in wet weather, but also offers maximum thermal efficiency without compromising the compressibility of the fibers. A StormHood slides over helmets with ease, and the adjustable hem provides a personalized, snug fit should you desire it.

  • A versatile, highly adaptive jacket for all aerobic activities
  • Tyono exterior is durable and wind-resistant for protection
  • DWR treatment sheds light moisture easily
  • Coreloft insulation keeps you warm even when wet
  • Stretch side panels promote unobstructed mobility
  • Articulated elbows and gusseted underarm bolster comfort
  • Helmet-compatible hood is insulated for added warmth
  • Adjustable hem provides a personalized fit and feel
  • Reviews
  • Q & A

The Perfect Midlayer

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Medium

From the endless glaciers of Mount Rainier, to the massive granite faces of El Capitan, and the rugged ice clad peaks in the high Sierra the Arc'teryx Atom LT is perhaps the best insulating piece I have ever used. Its functionality is very well thought out, and with high versatility, decent durability, and high comfort it is a true workhorse in any environment. This jacket was designed with the intention of moving fast in the mountains, because of this the jacket is lightly insulated and highly breathable, but also surprisingly warm for how thin it feels. For storage, the jacket can be easily packed into its own sleeve.

Insulation
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The jacket uses 60 grams of Coreloft™ insulation. Composed of polyester, this material is durable, lightweight, dries far more quickly than down, and most importantly will still keep the user warm when wet.

Fabric
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The outer shell of the Atom LT is composed of 20 denier nylon Tyono™ fabric on the majority of the jacket, and a polyester/elastane Polartec® Power Stretch® fabric under the arms and on the sides of the jacket. The Polartec® fabric is extremely breathable, and is quite stretchy. This gives the user better range of motion especially when reaching overhead while climbing. The Tyono™ shell material is DWR treated and is thus highly water resistant. I have walked for miles in light to medium rain in this jacket while remaining completely dry. The same material also makes the jacket exceptionally wind resistant, The interior of the jacket is the same material as the outer with the exception of the underarms which are a soft comfortable fleece.



Comfort
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One of the greatest reasons that I love this jacket, is that it is incredibly comfortable and remains so indefinitely while moving in the mountains. Because of its superb breathability, the jacket has a massive comfortable temperature range. I have worn it from the mid sixties to the low twenties (Fahrenheit) and remained the same comfortable temperature. The hood is also climbing helmet compatible and works well both under and over a helmet. The jacket is also extremely lightweight for the warmth that it provides, and feels almost weightless as you glide across technical terrain with ease. This jacket makes the perfect mid-layer, and when paired with a good base layer and high end hard shell such as the Arc'teryx Alpha SV (review coming soon). It is perfect for almost any conditions in alpine environments weather hiking, climbing, backpacking, or skiing.



Reliability/Durability
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After 6 months of very heavy use in the mountains, the jacket is still in almost perfect condition/ The outer shell is surprisingly resilient for how thin and light it feels, and provides decent protection against abrasion. The jacket did get a small hole after getting snagged on a section of razor sharp rock while climbing in Wyoming, though this was easily repaired with a tiny Goretex patch. Other than that, one of the jacket's cuffs is starting to show signs of wear as a small hole has appeared where the cuff connects to the shell fabric. As far as reliability, this jacket has never failed me even after hundreds of hours in the mountains and in often heinous conditions; rain, snow, sleet, sand, dirt, nothing can stop this jacket from doing its job. When cared for properly and washed with an appropriate technical clothing detergent (Arc'teryx recommends Grangers, but Nikwax works just fine) the jacket remains in very good condition, and the insulation has not lost any loft whatsoever.

The Perfect Midlayer

Replacing my first Atom

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: small

I bought my first Atom back in 2010 and have just now (7+years later) decided to buy a new one because it's starting to show it's age a bit. The Atom has been my 'go to' warmth layer for hiking, skiing, and even just walking the dog on a cool morning. The fit is modern and clean, and does not feel bulky. It repels rain and keeps you warm with minimal under layers. Great travel jacket because it packs down light and can handle a wide range of temperatures and weather scenarios. I can't think of a better jacket in this category. I'll probably buy another one in another 8-10 years.

"Main Squeeze"

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Medium

This is my go to wear. Hiking, climbing, skiing (base layer), biking (early summer, late fall), camp fire, night hikes, cold office and all the fun activities that I can do in SLC, UT.

Utili-LT!

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Medium

You will reach for this layer more often than not. My first Arcteryx piece and fell in love after the first use. It is very light and punches above its weight in warmth but with the mesh side panels is perfect for a bit more active pursuits. I have been using as insulation layer under my snowboard shell and as my puffy on a milder temp backpacking trips. I bought it with split-boarding in mind for next year. It sheds light moisture and is really soft to the touch. Do be careful with board edges, crampons, etc! It does tend to run just a tad trim due to Arcteryx's apline-oriented sizing standard, but I bought the size I would in any other brand.

Still not a size Large :/

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: Large

I am a true medium in every shirt and jacket, except I usually buy Large in outer layers..... but I should have stuck with the medium because it still fit well in regards to length but was just a little too bulky for my taste.

However, my dad liked it so much and it fit him perfectly that I had no choice but to give it to him.... and he said some stuff about raising me and blah blah.

(he's fit but built in his upper body, 6'2", and usually always wears a size large).

Great for casual walks in chilly temps

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: Large

I love this jacket. I live in Utah and have been using a North Face Thermoball and it's a little to heavy for walking around town unless it's stormy and snowing out. This jacket breaths and is perfect for physical activity when it's not the dead of winter, but also functions well as a mid layer in below freezing temperatures. It is also more fitted and very comfortable.

Great Jacket

    Comfortable, great for pretty much any weather.

    Everything you would hope for

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size

    I don't know if I can add anything that someone hasn't already said. The proof is in the details for this jacket.

    As Advertised

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Small

    I thought about buying this jacket for a while, I read reviews, went back and forth over sizing, and finally took the plunge. So far, it's everything it's advertised to be. Its breathable yet warm, fits snug, but not too snug, and feels quality made. Before this purchase I was hesitant about Arc'teryx products, thinking it was just a more expensive brand name, but after this purchase I'll be looking for more of the same. I haven't put it through the wringer yet, but so far I've worn it every day since I got it, and in conditions including rain, sleet, snow, and sunshine. The Atom LT has been comfortable in each. The DWR treatment has water beading off like a slicker, the insulation is in the right areas for the right warmth, and the touch of fleece lined pockets is there to round it off. Great jacket, buy it or be disappointed.

    Love it!

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium

    It's a great jacket and I have been wearing it almost everyday. I am 5'11, 175 lbs and ordered medium. (Usually order medium for most jackets) Considering It looks a bit tight fit through the mirror but it's surprisingly comfortable and I don't feel any tightness in any particular places. Large size might be better for the look but medium still works great for me since the main reason I bought this is to use it as a mid layer for cold weather. I will probably try a large size next time I purchase other Arcteryx products.

    Super light and comfy!

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size
    • Size Bought: M

    I just got my first piece of Arc Teryx, the Atom LT. Instantly I want the whole collection. The fit is insane, craftsmanship is unreal and functionality is stunning. Truly a believer now in the Arc.

    Atom LT is the best

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: large

    Wore this recently in New Zealand with great success. It was a cold, windy, rainy summer this year (Jan and early Feb) but the jacket performed flawlessly during the entire trip. It shed light rain and withstood the 'gale force' winds we routinely encountered. It is standard gear for spring, summer and fall trips. It packs down to almost nothing, it is lightweight and provides excellent insulation alone or under a rain jacket. There should never be a reason to leave it at home.

    Awesome jacket & customer service

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium

    Great all around jacket! If you are looking for a do it all kind of jacket, this is the one. Very light weight yet surprisingly warm. I have only owned for a couple of weeks but so far it seems very durable, well built and well designed. Also, gearhead Matt was a huge help with selecting the right size.

    Glad you are loving it. Arguably the best mid layer out there. Happy to help out!

    Matt
    Gearhead
    801-619-7499
    mmyers@backcountry.com

    Great Insulated Jacket

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Large

    Great jacket! The material is very high quality, as expected from Arc'teryx. I am usually in between a Medium and a Large depending on the brand of the jacket, but this one fits me perfectly in a Large. It has very good breathability and is insulated really well. I have used it quite a few times as a mid-layer in temperatures down into the low 30's and it kept me nice and toasty. This is my new go to jacket. Highly recommend!

    Best Ever Jacket

    • Familiarity: I've used it several times
    • Fit: True to size

    This is the best mid layer I've ever had. Winter returned here in the Tetons with a vengeance last week, and I've worn the Atom LT three times. On day one, we skinned 1700 vertical feet at 10 to 15 degF with wind gusts to 25 mph. This was my outer layer over a light base layer and an old sleeveless climbing suit. I used the hood. Perfect--the venting system under the arms keep moisture to a minimum. Warmth good. On the 2nd day, it was 25F, again very windy, and snowing heavily. Again, I skinned three times with this as an outer layer. Got a little moist this time, but not cold. It dried in the ridge-top wind, but I didn't add a layer until right before descending, staying warmer de-skinning and snacking than my compadres who dealt immediately with layers (I did not).
    Fit: I'm between a medium and large, but medium's tend to hug/bind my armpits too closely. I bought this large based on other reviews here, and I couldn't ask for a better fit. The fabric is soft, and the zippers smooth. Hood adjustment from the rear is excellent.

    Killer

      It seems like everyone who works here owns one of these Jackets, and for good reason. This Jacket is killer. I would for sure recommend it to everyone, its great warmth for the weight, pretty durable, just plain awesome.