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Arc'teryx Atom LT Insulated Jacket - Men's



Why We Like The Atom LT Jacket

We wear the Arc'teryx Atom LT Insulator all year long. It's an excellent midlayer for winter skiing the resort or backcountry, and we pack it for every alpine climb and backpacking trip in the summertime. Air permeability lends to its versatility by breathing immediately instead of when we start to sweat like standard breathable insulators. By breathing the minute we put it on, the Atom LT warms us up whether we're setting the skintrack or rapping off past sunset.

  • Versatile midlayer designed for mountainous athleticism
  • Air-permeable fabric maximizes breathability
  • DWR treatment offers snow-shedding water-resistance
  • Stretchy fleece side panels provide moisture-managing mobility
  • Dual hem adjusters and improved cuffs ensure a secure fit
  • Item #ARCZ968

Tycno 20 (100% nylon) [stretch fleece] 94% polyester, 6% elastane [Dope Permeair 20] 100% nylon
Coreloft (60g/m²)
Center Back Length
2 zippered hand, 1 zippered internal
Claimed Weight
Manufacturer Warranty
skiing, climbing, hiking, camping, casual

Tech Specs

What do you think about this product?


>Rating: 5

Great midlayer

I've put it through the wringer
True to size

I've used this as a midlayer under my ski jacket on colder days. Also a great jacket on its own. Synthetic insulation is warm, the fleece on the sides allows it to breathe really well. It's honestly one of my favorite and most versatile jackets because of its warmth and breathability.

>Rating: 5

Great shopping experience

I've used it once or twice and have initial impressions
True to size
Size Bought
5` 8"
171 lbs

What I received is a brand new product, the quality and size are what I want, it is really great!

>Rating: 2

They changed the fit!

I've put it through the wringer
True to size
Size Bought
5` 11"
195 lbs

Let me start by saying Arc'teryx is arguably my favorite brand. Their customer service people I deal with are in general, quite helpful and sincere. I had a zipper-tooth break/fallout from my old Atom LT. It was the LEAF model. I brought it to the Arc'teryx Store in SoHo, NY... in Nov 2019! It is officially a year later and I'm still dealing w this! (granted a lot of this is my own fault for not making it a priority and checking in regularly or daily - i fully admit that). First they claimed to have no idea what happened to my jacket! Then they said it was stuck in customs! Then they said it was back in Canada. (This is all PRE-Covid mind you). Finally they decided to just send me a new model. Here's where I got really annoyed... they RAISED the armpits about an inch (easily, maybe more). It feels really uncomfortable now. And I definitely can't use it as a layering jacket with a sweater or mid-layer in between! I don't know why Arc'teryx changes this stuff... for the few people that actually use this to climb K2... fine... but for the rest of us who wear this day to day - we don't need raised armpits for extended mobility. After a year, and all said and done they have offered me a credit. To be honest I really love my old jacket and just want that back. For such a great company making such great products, wish their repair/return process was more thorough and expedient.