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  • Arc'teryx - Atom LT Insulated Jacket - Men's - Katalox
  • Arc'teryx - Atom LT Insulated Jacket - Men's - Pilot
  • Arc'teryx - Atom LT Insulated Jacket - Men's - Rigel
  • Arc'teryx - Atom LT Insulated Jacket - Men's - Sangria
  • Arc'teryx - Atom LT Insulated Jacket - Men's - Black

Current Color

  • Arc'teryx - Atom LT Insulated Jacket - Men's - Katalox
  • Arc'teryx - Atom LT Insulated Jacket - Men's - Pilot
  • Arc'teryx - Atom LT Insulated Jacket - Men's - Rigel
  • Arc'teryx - Atom LT Insulated Jacket - Men's - Sangria
  • Arc'teryx - Atom LT Insulated Jacket - Men's - Black

Arc'teryx Atom LT Insulated Jacket - Men's


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    26 Reviews


    From ski resorts to summer camps.

    You might zip up the Arc'teryx Men's Atom LT Insulated Jacket all year long because it's so versatile. Coreloft insulation makes this jacket an excellent midlayer for winter skiing, and you can wear it on cold camping trips in the summertime. Polartec's Power Stretch side panels ensure a full range of motion in a breathable fashion, and Arc-teryx coated the durable shell with DWR for water-resistance.

    • DWR-coated shell
    • Coreloft insulation
    • Polartec Power Stretch sides with Hardface Technology
    • Trim fit, hip length
    • Zippered hand pockets
    • Zippered internal chest pocket
    • Item #ARC004G

    Tech Specs

    [body] Tinthan (nylon), DWR finish, [sides] Polartec Power Stretch with HardFace Technology (88% polyester, 12% spandex)
    Coreloft (60g)
    hip, drop-tail hem
    Center Back Length
    29 in
    2 zippered hand, 1 zippered internal chest
    Claimed Weight
    11.1 oz
    Recommended Use
    skiing, climbing, hiking, camping, casual
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    My boyfriend hardly takes it off!

    • Familiarity: I gave it as a gift but have feedback to share
    • Height: 5'4"
    • Weight: 135lbs

    Got this as a gift for my boyfriend and he wears it everywhere. What he loves most is how soft and light it is given how much protection it gives him. It's super warm for its weight and it resists the wind fine during breezy days. Great for layering under a shell when skiing when the conditions are on the cold side.


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

    The Atom LT jacket is great. I have used it almost daily in the October/November/December shoulder seasons for commuting. If its above freezing but below 50 degrees, the jacket is perfect: I never get cold (and rarely too warm) and never overheat with a backpack on due to the side vents; its wind resistant in light wind conditions and has DWR to keep from getting wet if there is some slight precipitation.

    Looking forward to using it on the slopes as a midlayer when we get some snow.


    • Familiarity: I've put it through the wringer

    This item is my second of the Atoms. My first one is about 4 years old and is worn all year round, in and around the house. I am wearing it right now with nothing under it as I type. My new one is hanging in the closet and I won't wear it until my first one is worn to shreds. It may be a long time before my new one sees any action.

    Light, packable and warm

      I bought this for my husband after we moved to Shanghai from Beijing where we had to deal with with warmer but more rainy weather. This jacket is perfect for fall, early winter and spring. It's not too sporty and smart design makes it versatile for most occasions.

      best mid layer ever

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

      So I've been a fleece guy for years but decided to switch up my mid layer game this year . I ski mostly in the north east but get out west a few times as well. I've worn this in everything from 38 degrees/sunny to -10 /howling and the warmth, breath-ability, and overall comfort are just outstanding. The best part it, its so compact feels like not wearing anything under hard shell (Beta AR Jacket). Between the full length zipper and the pit zips on my shell I've never had better temperature regulation in my 40 years of skiing. Not inexpensive but worth every penny

      All Around Season Usable

      • Familiarity: I've put it through the wringer
      • Fit: True to size
      • Size Bought: Medim
      • Height: 5'11"
      • Weight: 155lbs

      What's great about this jacket is the multi-seasonal use. The Atom Lt is light and warm which makes it super packable. It's great for colder summer nights, chilly Autumn/Spring days and a great underlayer for those Winter days. For me its a great underlayer for skiing because it is light, warm, and really breathable. I bought a Medium and its a great slim fit. Perfect in the arms but I prefer the torso length to be a bit longer. As an underlayer the torso fit is good. This is a high quality jacket you can use year round.

      Dad Approves!

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

      Bought this for my father for Christmas. He absolutely loves this jacket! Whether he's out and about running errands, exercising, or at work, this jacket is always with him. Gifted like an expert this year! Thanks Arc'teryx!

      Atom LT

      • Familiarity: I returned this product before using it
      • Fit: True to size
      • Size Bought: large
      • Height: 6'2"
      • Weight: 200lbs

      Very nice lightweight jacket. Good finish, stretch panels on sleeves and sides are great. Compared to a Mammut Foraker and went with the Foraker. The Atom is a great jacket and more 'finished', the Foraker is sportier and may have a little more give. The Atom LT is a trimmer fit than the Atom AR but the Foraker is a trimmer fit in the torso than the LT.

      Best piece I own

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

      Honestly, I didn't want to love this coat. I was rooting against it for some reason. But I just can't not love it. I can ball it up, throw it in a bag, literally crush the thing, and it does it's job incessantly.

      I run hot* but I've snowboarded on multiple days with a shell and this thing underneath in -30 weather, and been completely fine.

      I was between this and the Patagonia nano, and I'm realyyyy glad I made this decision.

      Great Piece, But Very Baggy Arms

      • Familiarity: I returned this product before using it
      • Fit: Runs large
      • Size Bought: Medium
      • Height: 6'0"
      • Weight: 150lbs

      I really wanted to keep this jacket but the arms were extremely baggy. Not a good look.

      Every Day Jacket

      • Familiarity: I've put it through the wringer
      • Fit: True to size
      • Size Bought: medium
      • Height: 60'
      • Weight: 140lbs

      I bought this jacket to get me through the mild winter of the Southern US, however I have since moved to Edinburgh, Scotland and I have still worn it almost every day. Although this jacket is not waterproof it does do alright through most storms at least on shorter journeys. It does well to cut down the wind as long as long as it is coming toward you or at your back, the vents on the side make it a bit dangerous when the wind is coming from the side. The zipper pockets are great for storage and keeping your hands warm. The sleeves are finished with a great stretchy material making the cuffs incredibly comfortable and they also work well with gloves. The inside jacket pocket is the perfect size for a wallet.

      Great piece

      • Familiarity: I've used it several times
      • Fit: True to size
      • Size Bought: large
      • Height: 6'2"
      • Weight: 198lbs

      I debated whether to get this and finally decided to try it out. I use it alone or as a mid layer under my LEAF Drac jacket. Overall very nice, not as warm as my Cerium and Thorium, but its close to it.... and its pillow soft. Wish it has a hem cord.

      Preliminary Report: Wonderful

      • Familiarity: I've used it several times
      • Fit: Runs small
      • Size Bought: Small
      • Height: 5'9"
      • Weight: 132lbs

      I bought this jacket after last season, so I haven't taken it out on the slopes yet but will update this review when I do. I've used the jacket a handful of times for other things in the meantime and love it so far. I'm 5'9" and 132, and a Small fits me great - close to the body but not restrictive at all. (I wear slim fit and sometimes tailored slim fit dress shirts, and while I abhor the word "skinny," it's what I've been called my whole life.) It has these stretchy side panels all the way through the underarms, so it allows total freedom of movement. I can even wear a base layer AND a thin microfleece jacket under the LT comfortably.

      (I rated it as running small only because I'm so used to even Smalls being slightly too big for me in sports gear, and I've certainly never owned a jacket that fit so close to the body.)

      Yesterday I wanted to field test what I am going to wear skiing at Big Sky this spring, so I had on a SmartWool base layer, the LT, and an unlined Gore-Tex shell to shovel during Snowzilla DC 2016. I was perfectly warm under grey skies, light snow, and 27 degrees. I didn't feel like I was sweating, but since I shoveled heavy, wet snow for two hours and was breathing hard, I probably would have realized I was, if I'd thought about it. And when I went back inside, the LT was heavy with dampness - so I guess it really does wick away moisture and keep me comfortable! I never thought about feeling wet or hot. I don't know how fast it dried, though I'd wanted to note that, because I hung it up in the guest bath and forgot about it.

      Today at 1:00 pm, I wore a cotton t-shirt, a microfleece, and the LT, and just shoveling for 30 seconds under sunny skies and 33 degrees, I was hot and immediately took off the LT. After shoveling, I put it back on, and it was perfect for taking a leisurely walk at about 2:30 pm.

      It is extremely light, and that makes its performance all the more impressive, as well as making it a pleasure to wear.

      I've worn it in town when it's been maybe 50 or so, and it's too cold if there's wind, since its breathability also means the wind goes right through.

      It doesn't have a bag, but it packs into one of its own sleeves. And you can do this cool parlor trick where with one yank of the wrist, the whole jacket reappears (you'll want to demo this for your friends) - but I have to say, when it comes out, it's completely wrinkled. (Eventually the wrinkles work themselves out, but it looks pretty bad until then! Next time I might try just folding it into fourths and flattening it in a Space Bag.)

      It has this cool flap at the very top of the zipper so that the zipper doesn't come into contact with your neck if you zip it all the way to the very top. And the wrists are snug (not tight like elastic), which is great since you may be putting on another layer... but it's easy to put your hand through the end because it's stretchy, like the side panels.

      Finally, I used to wish the Arc'teryx logo was embroidered, but I just realized it's reflective, so you can be seen when walking at night - especially important with the dark charcoal or black colors!

      All in all, a well-designed, great performing, very comfortable, good-looking jacket! I'll let you know how it does for me on the slopes!

      The Best for Synthetics

      • Familiarity: I gave it as a gift but have feedback to share
      • Fit: True to size

      I've been spoiling my dad with ArcTeryx, and when he started talking about needing a new insulating jacket, I knew the Atom LT was the ticket. He had mentioned that he wanted something synthetic for ski touring, and having the women's Atom LT myself, I figured he would love it just as much as I do. Sure enough, he barely takes it off! He's been taking it out skiing- awesome layer under his shell, and easy to stuff in your pack if you're too warm. Also a great layer for around town. Sheds light moisture, wicks moisture, and the stretch panels along the sides allow for better breathability as well. True to ArcTeryx sizing- he's 5'11, 160lbs, athletic build- always a Large, and the L fits him like a glove (especially in the shoulders and arms where others always fall short). Plus the Anaconda color is pretty sweet!

      Remarkably light, remarkably versatile

      • Familiarity: I've put it through the wringer
      • Fit: True to size
      • Size Bought: Medium
      • Height: 6'0"
      • Weight: 185lbs

      Before I picked this up, I thought all of the hype surrounding the Atom LT couldn't be real: boy was I wrong. This jacket has become my favorite layering piece and casual jacket to take the dog out for a walk. The atom is super light, takes up hardly any room underneath a shell, and is ready to take on high exertion activities. The side panels of this jacket allow for some serious heat dumping and moisture wicking, so you won't find yourself freezing when you get sweaty while skiing. I wear a medium in this jacket and it fits perfect- if you like a less athletic fit, go a size up.

      Atom lt review

        This is a really good jacket. It's very comfortable and warm for its weight. It really needs a drawcord at the hem. I sent mine back for the hooded version that has a drawcord at the hem. But then I got the hooded version and the hood is not good at all, it looks like a mushroom on your head so I might get the jacket again, still deciding.

        All you need, .nothing you don't

        • Familiarity: I've used it several times
        • Fit: True to size
        • Size Bought: Large
        • Height: 5'8"
        • Weight: 190lbs

        I picked this up on a steal of a deal from a local store, and it fits nicely into my ever expanding quiver of jackets. It's no secret that these lightweight 'fleece alternative' type synthetic jackets have taken the outdoor gear world by storm these last few years with just about every company, big or small, making their own version. I've had a Patagonia Nano Puff pullover since they first came out, and it's been on of my favorites pieces of all time. However, wanting a full-zip jacket version and something more breathable, it came down to either a Nano Air, or this Atom LT.

        The Atom is a little more breathable/less warm than the Nano Air, but it's the perfect companion under a hardshell skiing in less than frigid conditions, or as an everyday piece during the cool months, whether hiking or in town. For other reasons not related to this jacket, Arc'teryx is not a favorite brand of mine and I prefer other brands, but I'll give credit where credit is due. They generally make a good product, and this one is no exception. Fit is trim but not snug and with a nice bit of stretch to accommodate a full range of motion. I've had larges that I've been swimming in excess material, and larges where I can't hug because the shoulders or too tight, but this one sits perfectly in the middle.

        Also, just for comparison sake, I also own a ThermoBall hoody from The North Face. It was given to me by my work and has a large/bulky patch sewn onto the back, so for that reason I don't use it much for backcountry pursuits. But, if you're looking for lightweight warmth, the ThermoBall series is definitely warmer than both nano puff and atom series jackets, and is only a tad heavier.

        Perfect fit

        • Familiarity: I've used it once or twice and have initial impressions
        • Fit: True to size
        • Size Bought: large
        • Height: 6'6"
        • Weight: 195lbs

        Have not used it yet because I purchased it during the summer in Texas. The jacket has a perfect athletic/slim fit. I'm 6'6" 195 and the large fits great

        Unanswered Question

        I live in southeast Georgia where a majority of the year you can get by with a lightweight jacket. What's the coldest this jacket would be good for? Thanks in advance.

        Ever layer one Atom LT over another? Sometimes my LT Hoody isn't enough and I wish it were warmer but still had the side panels to vent during exercise. Horrible idea or work well in anyone's experience? Used to work at Patagonia and we'd always double-down with two down jackets when things got colder. Thanks.

        I've worn my Atom AR over my Atom LT for more warmth, but that was just out and about. Found it to be nice. Don't have experience doing that with very active activities, but I have found that it's quite comfortable.

        blu - I was just going to suggest that you look into the Atom AR rather than two Atom LTs. The AR has (i think) twice the amount of insulation in the torso as the LT, with less in the sleeves and less still in the hood, but without the LT's Power Stretch Pro underarms. It might be exactly what you are looking for. i hope this helps.