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


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    99 Reviews


    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
    • Item #ARC004F

    Tech Specs

    [main] 20D Tyono, DWR coating, [side panels] Polartec Power Stretch with Hardface Technology (88% polyester, 12% elastane)
    60g Coreloft
    yes, helmet-compatible StormHood
    2 zippered hand, 1 zippered internal chest
    Claimed Weight
    13.4 oz
    Recommended Use
    climbing, skiing, backpacking
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    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.

    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.

    Wearing it Constantly

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

    Bought this while on sale and couldn't be happier. I bought this in preparation of a ski trip for use as a mid layer and have ended up wearing this nearly at all times. It was terrific for skiing in the single digits (Fahrenheit) with just a windbreaker over and thermal underwear below, but has been my go-to for everyday use. It looks and performs great. It's very light, fits more fitted, has side panels that allow for some venting, and has an elastic cord around the waist that can be cinched and act as a snow skirt.

    Temperatures below 20-ish Fahrenheit might be pushing it for this jacket if worn alone so I'd recommend a hard shell/windbreaker to protect from wind chill. I wouldn't have bought this at the normal price, but if it's on sale I recommend it wholeheartedly.

    Good mid-layer for casual sports

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

    I purchased this mid-layer with the hard shell Iser jacket (small size) for skiing. If you wear them both, then you won't feel cold when it's around 5 Celsius degree in a city like Philadelphia since the hard shell is totally wind-proof and the Atom LT is enough to keep you warm. Besides, this jacket is really lightweight and compact.

    As for breathability and water-proof ability, I cannot make objective comment right now. I may update this comment after I go skiing with friends this month.

    What hasn't already been said?

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

    This jacket is awesome. I can use it as an external layer down to about 25 degrees in total comfort, it sheds light rain/snow really well, and its an awesome breathable layer to be used under a ski shell or a parka. The only reason I didn't give it 5 stars is the super comfy elastic around the cuffs has started to stretch out and doesn't fit tight around my wrists any more.

    Awesome jacket, great design

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

    Gave this to my good friend as a birthday gift this winter and I can say that these are amazing as a go to for anyone with a slim, yet strong body type. The lower torso taper is tighter and less baggy than the Nano Air for example. The sleeves are also tapered to be tighter towards the cuffs, this is a very good thing if you are wielding an ice ax, climbing or even trying to fit it flush inside of a glove.

    (88% polyester, 12% elastane) construction allows for the perfect balance of breathability and stretch. Great balance of all features, perhaps the only thing lacking compared to others near the price point would be the 60g Coreloft, this insulation can't quite touch the warmth of either a down fill contempory or the 60g FullRange synthetic on the Men's Nano Air.

    Great insulated layer

      The comfort and breath ability of this jacket is perfect for a insulated layer. The under arms are made with a polartec stretchy material allowing for great breathability when under a shell with pit zips. Also works great as an outer layer down to about 20 degrees with a good fleece underneath.

      Arcteryx Atom LT

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

      what an amazing piece of clothing. I love Arcteryx but this takes it to another level.... the jacket fits like a glove and is so light and comfortable you forget that you have it on. It breathes really well and you don't get too hot. It is surprisingly warm for how light weight it is. I understand now why they put the Atom in the ESSENTIALS category. Everyone should own this jacket.

      I mean, c'mon

        The Atom is awesome. I really like the fit of Arcteryx, I can't stand when a puffy looks state puffy, this one is trim and awesome. As it is an LT it isn't super warm, something I wish was a little better considering its $250 price range. It's just about a perfect jacket into the 30's, colder than that and I'd look elsewhere and probably wish the whole time it was more like the Atom.

        Duh, its and Atom LT

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

        Its an Atom LT, what else do you need?

        My BF uses this for work EVERYDAY! He's always running around inside and out and it works great. This is his 3rd Atom. they hold up well

        best piece of clothing i've ever owned

        • Fit: True to size
        • Size Bought: medium

        Look, if you're even hesitating buying this you need to just pull the trigger right now. It's so good I'd be willing to personally stake money on you loving it.

        I bought my Atom LT back in early 2010 and I've taken it everywhere from Wyoming in the dead of winter to the jungles of Peru during the rainy season. It's been everywhere from sea level to nearly 5500m. I've taken this thing climbing, skiing, backpacking, drinking, you name it. It's been scraped up against harsh granite, been covered in mud and assaulted by thorns yet it still looks great despite two small patches in the forearms. That's 7 years of brutal punishment! Not even my hardshells have lasted that long!

        I think what makes the Atom LT so great is its incredible balance between comfort, warmth, and breathability. The side panels are stretchy and let heat vent out incredibly well while not letting you lose a ton of heat if it's chilly out. If you're really cranking out sweat it all seems to vent well out the sides as well. If it's super windy out or stormy, throw on a shell. Getting warm? Unzip it a bit and you'll cool right off. Really warm? It's small and light enough to tie around your waist. While for extremely cold weather down is a better option, I find myself rarely using anything other than this jacket and a shell (and a baselayer where appropriate) for anything between -20C and 20C.

        Fitwise, it's tapered but gives you some room to layer. I could easily wear both a small and a large but find the medium the most comfortable. It does stretch (the panels do) over time so take that into account.

        One final note: make sure to wash with some good residue free soap (the Nikwax stuff works well) and retreat DWR with Granger's XT (make sure to put it in the dryer!). Keeps the jacket performing like new.

        tl;dr you'd be a fool not to buy this jacket

        Absolutely love it!

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

        I got this jacket to replace heavier winter coats for casual applications, and to serve as a mid layer for skiing and snow snowshoeing and cannot say enough great things about it. In addition to being lightweight and collapsing to a very packable size, it is super comfortable with amazing range of motion.

        I used the jacket as an outer layer while snowshoeing on a clear day that was in the 20's temperature-wise and I was able to use my arms freely without feeling any bulkiness or restrictions on my range of motion. The jacket was easily able to repel wind gusts of up to 35mph without letting any of the cold air in. Lastly, and most importantly, I did not overheat; the jacket was nice and warm without leaving to feel like I was roasting in it, leaving me to concentrate on taking in the beautiful scenery and focus on breathing while making our climb.

        While I still feel like I'll need a more durable outer shell for really nasty weather, this jacket performs extremely well for just about every other condition I'm ever likely to face.

        I never want to take it off!

        Absolutely love it!

        Has anyone had any problems with the zipper? I haven't worn it yet but just pulling the jacket open when it's half zipped, tends to unzip really easy.

        Just concerned of it unzipping easily while doing things.

        My heigh is 5'5", should I go for the xs or small one? I also wanted to know how long is the jacket (is it hip length or like in the mid thigh)?

        Unsure about what size I should get...I am 6'0 170lbs with a slim/athletic build. I want to be able to wear a fleece jacket underneath this, so I was thinking a large, but I am not sure...

        I'm built similar to you (6'1" 175lbs) and sport a medium in this jacket and would not be able to fit a light 100wt fleece under this comfortably. You would probably be better suited with a large if heavy layering will be used. It's a tad slimmer than say a similar Patagonia sized jacket, but works great with a long sleeve shirt or thermal. I love this jacket for it's weight to warmth ratio you will not be disappointed...

        How well does the hood fit when not wearing a helmet?

        Hey Matthew, I've never worn a helmet with mine and have had no issues with the hood. I do not own the newest version of the Atom LT, so my hood doesn't even have any adjustments. Considering my experience and how you can now adjust the hood, I'm confident you won't have any problems.

        I am trying to decide between the hood or no hood. Definitely plan to use it under my shell for skiing which is where the hood could be annoying. But for other things where I use it as an outer layer (belaying mostly and/or hiking) the hood may be nice. Is the hood annoying under a coat or is it not too bad?

        Hi, I'm 181 cm / 73kg / 95 cm chest.

        Would you recommend a Medium or a Small?

        The chest measurement is the best to go off of when picking out jackets. The small will actually be a perfect fit for you if you want to wear the jacket the way it was intended to be worn which is athletic or slightly tighter for people climbing in it. If you want a much more relaxed fit then the medium is an option but, I feel that it would be way to big as the small chest measurement fits best for people at 97cm.

        If you have anymore questions feel free to send me an email or call!

        Bill Porreca


        Is there a jacket similar to this but more waterproof? Open to other brands. thanks!

        With the DWR treatment this tends to shed rain about as well as a softshell. If you're looking for full waterproofing you'll probably want to look to a hardshell. If you're looking for light versatile layers I like the Patagonia Alpine Houdini as something to get on quick when the wet gets insistent.

        I am 5'10 and 175 with an athletic build - what size would you recommend? Thanks!

        How would you compare the warmth of this jacket to that of Mountain Hardwear Ghost Whisperer or another similar down jacket?

        Best Answer

        I think my Ghost Whisperer might be slightly warmer than my Atom.

        The warmth of any down jacket is going to be directly related to the loft. Thicker = Warmer. Note - Fill Power is a measure of how light and packable the down is. This is where the Ghost Whisperer blows most jackets out of the water.

        The atom still has an advantage in a lot of areas, however. It's more comfortable, I like the way it breathes better, I like the hood better, it's more abrasion resistant and it moves better. It's also going to do better in wet weather being that it's a synthetic. The Ghost Whisperer is still going to win in the lightweight and packable categories however so if that's your priority, then the ghost whisperer may be the way to go.

        The atom is probably the best jacket for 85% of situations and a favorite of a lot of people I've worked with over the years in this industry. I think everyone should have (at least) one.

        Why is "rusted copper" a shade of orange? Shouldn't it be a shade of green? Just sayin'.

        So I am debating between the S and M i am 5' 7-8" and 145-150lbs i want to be able to add a layer like a hoody underneath so i don't know if the small would be to tight but i don't want the medium to be to baggy if i wasn't wearing a hoody under it. so not really sure what size to get any help is appreciated thanks!


        At the moment I'm looking for a super versatile, do it all, tough jacket that I can rely on in a multitude of conditions. I've narrowed it down between the Patagonia Nano-Air Hooded vs. this Arc'Teryx Atom LT Hoody. Could someone give me a breakdown on the pros and cons between these two jackets? I'm trying to find as much info as possible so I can make the right decision when purchasing my next jacket. I've only found one article online that discusses these two jackets exclusively, so if anyone can help me out, that'd be great! Thank you very much!

        Hey Jane Hwang.

        The man in the photo... what size he is wearing? And what is his height?

        I see that the LT is Hood compatible. If worn without a helmet is the hood too large on your head. I would like to use this jacket without a helmet for hiking.

        Also, is this jacket a 2014 version and does the hood and waist have draw strings ?

        Aside from the LT being warmer how would you compare the LT to Outdoor Research Cathode Hooded jacket ?

        How well does this hold up as an outer layer? Looking for a swiss army knife type jacket... Lightweight/Compressible, Insulated, Water Resistant/Proof... Hoping this might be the right piece. Love Arc'teryx gear in general. Thanks for any advice on it.

        Best Answer

        Hey! Jacket definitely is water resistant but, not proof. I would also question the durability of this jacket on the mountain as an outer layer. As a around town jacket it is just fine, I would even wear it touring on the up but, on the down snagging trees and what not you really need a hard shell or at least the burlier version of this jacket in the AR version,

        Does anyone know what is the main difference between atom leaf vs ordinary model?

        Does leaf atom model have 40d fabric?

        How does it compare in general to ordinary atom?

        The main differences between the leaf model and the regular one are that the leaf has a more durable face fabric (called Gossamera--same fabric as the Atom AR), it is a few ounces heavier, has a "vertically routed" hip adjustment cord, and the color of the logo matches the fabric color. In my experience, the leaf model fits a little baggier. I ended up going with the regular model because it fits a little trimmer and is more packable, which is what I was looking for.

        I bought an Atom LT hoody about a year ago on BackCountry. I love everything about this jacket except for one major issue. The main front zipper will not stay all the way up when doing almost any sort of activity. It literally falls down 4-5 inches even when just wearing a backpack. I talked to Arcteryx with no resolve and was told it was by design to make one hand operation easy. My question is have they fixed this design issue for the new model this year? I love my jacket but this zipper issue is a tough one to overlook, just wish I could somehow get it resolved from a company like Arcteryx........

        I asked my buddy who used to work at Arc'teryx and he also says that the zipper is like that by design for easy one hand operation.

        For instance, when you have a shell on and want easy access to some ventilation, you can unzip your shell and pull on the collar of the Atom LT to open it up some. While the zipper is soft, I have one myself and haven't had problems with it unzipping too much.

        So to answer your question, no, they haven't fixed this--but they also don't see it as an issue since it was designed this way. Still love this jacket!


        What is the color of sleeves cuffs on green color? On official page I notice that they are grey but on attached picture i noticing they are same color as body color.

        Please let me know.


        Have a question about the Carbon Copy color. Is this actually the black color? In REI and a few other sites like EVO, the carbon copy color is listed as black and their Carbon copy version has the blue trim and interior color. So which one is correct?