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  • Arc'teryx - Atom LT Insulated Vest - Men's - Admiral
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  • Arc'teryx - Atom LT Insulated Vest - Men's - Admiral
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Arc'teryx Atom LT Insulated Vest - Men's


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    13 Reviews


    Just what the doctor ordered.

    Get your daily dose of core warmth with the superlight Arc'teryx Men's Atom LT Insulated Vest. Its Coreloft insulation makes the Atom excellent for shoulder season hiking, and you'll definitely appreciate it when your ski jacket isn't cutting it on winter's coldest days. Arc'teryx made the Atom's shell out of a durable Tinthan fabric that has a DWR coating for water-resistance. Polartec's Power Stretch material makes the sides air permeable as well as stretchy, and Hardface technology keeps the sides strong for many seasons of mountainous adventures.

    • Tinthan shell with DWR coating
    • Polartec Power Stretch sides with Hardface technology
    • Coreloft synthetic insulation
    • Trim fit, drop hem
    • Zippered hand pockets
    • Zippered internal chest pocket
    • Item #ARC004H

    Tech Specs

    [body] Tinthan (nylon), DWR coating, [sides] Polartec Power Stretch (88% polyester, 12% elastane), Polartec Hardface Technology
    Coreloft 60 (polyester)
    hip, drop hem
    Center Back Length
    29 in
    2 zippered hand, 1 zippered internal chest
    Claimed Weight
    7.6 oz
    Recommended Use
    hiking, camping, skiing, snowboarding, climbing, cycling, running
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

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    Perfect for chilly morning rides

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Large
    • Height: 6'1"
    • Weight: 195lbs

    I use this vest primarily as an insulation layer over my cycling kit when the air temp drops below 40F. It fits true to size, and in true Arcteryx fashion, is nice to wear both in the backcountry as well as the city.


    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: XXL
    • Height: 6'3"
    • Weight: 230lbs

    Weight to warmth ratio, breath ability, pack ability. If you are truly an active person who wants their gear to enhance their out door experience buy this vest. I wear this vest alone or under a shell. Simply put, if there is a vest as versatile as this vest then it's perfect because this vest is nearly perfect. Get away your traditional nylon mid- layer, why have your expensive gortex shell when your nylon jacket is going to trap your perspiration under the shell. This vest is just "smart".

    Super light insulation

    • Familiarity: I've used it several times
    • Height: 5'8"
    • Weight: 200lbs

    This vest is super comfy. It is pretty thin and doesn't add much bulk under a jacket, but it adds a ton of extra warmth for those bitter cold days

    Favorite Vest of All-time

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Medium
    • Height: 5'11"
    • Weight: 170lbs

    This vest is amazing. I love Arc'teryx's Atom much so that I have the vest, the long-sleeve version, and the long-sleeve hooded version. The vest is lightweight and has a minimalist profile so it's great for layering. It's also good looking enough to wear to work if I want to. The Powerstrech fabric sides make it even more comfortable. Like the review title says, this is my favorite vest of all-time. For sizing help, I'm often between a M and a L depending on the brand. Always a M in Arc'teryx and no different with this vest. M fits perfect. I'm 5'11", 170 lbs.

    In between sizes - chose a Medium

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size
    • Size Bought: Medium
    • Height: 6'2"
    • Weight: 180lbs

    This is a nice vest. Arcteryx makes quality products. My main use will probably be casual but I wouldn't hesitate to take it hiking in the winter. After reading the reviews, I decided to go with a Medium. For my size, the Medium fits close to the body. I can wear it over a t-shirt/ flannel shirt combo and I can also wear it over a light synthetic base layer/Arcteryx fleece jacket combo (the jacket is similar to the Arcteryx Delta LT Fleece Jacket - mine is an older version but looks to be about the same weight of fleece). With these combos, I have zero extra room in the vest. The fit in the chest feels the closest but it's not pulling the stretch material on the sides of the vest. The waist is spot on. I can run a single finger all the way around the inside hem but that's it. There's no drawcord at the waist so I wanted the fit to be close.

    Just to be safe, I decided to contact Arcteryx and see how the size Large would compare to the Medium. Here's what I received:

    Here are the measurements for the Atom LT vest.

    Chest Width 113cm
    Waist Width 107cm
    Bottom Width 107cm
    FT Length 69.6cm
    CB Length 74cm

    Chest Width 121cm
    Waist Width 115cm
    Bottom Width 115cm
    FT Length 72.4cm
    CB Length 76.5cm

    So, essentially, you're picking up a little over 3 inches in the body and about an extra inch in the length.

    For me, I decided to stick with the Medium. I like the close fit at the hem and I would rather have the vest be a little snug vs. the extra room the Large would provide. I'm ok with the length too but, if your stretched out (say, on a bike), the extra inch of length, on the Large, might be nice. If you're my size, it seems like you could wear either size depending on your preference for fit and desired use.

    By the way, my jacket size is 42L and my waist is 34 in most pants/shorts. Hope this helps.

    KILLER Vest

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

    OK, for the sake of being honest, I bought the atom vest instead of the jacket for... monetary purposes. turned out to be a great decision because this vest is bomber! keeps your core warm, plenty of flex where you need it, and breath-ability is off the charts. not to mention this vest looks SLICK... great for all occasions, especially when rocking a flannel underneath. From the slopes to main st., this vest doesn't disappoint.

    Daughter of the Year!

    • Familiarity: I gave it as a gift but have feedback to share
    • Fit: True to size
    • Size Bought: Small
    • Height: 5'9"
    • Weight: 130lbs

    I got this as a gift for Fathers day and my dad keeps telling me how much he uses it. He is an avid golfer so he needs a vest that can keep up with him all season long. I have the LT version and thought that it might be too restricting to golf in since it had sleeves. So when I saw a vest version I had to get it for my dad. This makes a great gift for any man in your life that is looking for a versatile piece that looks good and is comfortable.

    MUST HAVE...great gift for your sexy man

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

    My husband has several vests (North Face, Patagonia...) but I got this vest for him for Christmas and its so comfortable and warm he literally naps in it. ; ) I wish I was kidding. My husband is 6'3 230 and wears a XXL. Its slightly fitted but the sides are made with a stretch so its very flattering. I have the women's hooded version and I've hiked, biked and skied in it and its still in perfect condition. Arc'teryx is pricey... but WELL WORTH the investment. I've bought North Face jackets and the black faded and it in some places discolored. Hope that helps!

    Classy Vest for the Man with many Vests

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

    When asking Mom what to get to Dad for Christmas, the answer I get every year is, "you know your father really likes vests." This year I wanted to get him a vest to put the other vests to shame. Enter the Atom LT. He can wear this vest with a nice collared shirt underneath for a night on the town (Mom likes him looking classy), under a jacket as good insulating layer, or as an outer layer for milder outdoor activties. He is bigger man (6'1", 230 lbs.) and typically wears a 2XL and even with the trim fit design of the Atom LT, it fit him perfectly. Here is what he had to say:

    "I love my Arcteryx vest. It fits well and keeps me warm. I wear to work and play and it goes well in both situations. I like the length as it goes well below my waistline."

    Time to throw out some of the other vests in the collection, especially the fleece ones covered in dog hair.

    The Cool Little Brother

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

    I own the Atom LT Hooded jacket, and since I am absolutely in love with it, I had to get the vest. This is a slimmer fitting vest that works great for high aerobic activities with mild temps where you would find a jacket being too much. It always doubles just as well as an insulating mid layer since the overall volume of the vest is low while still insulating very well. Trail runs, skiing, or just over your favorite flannel, this vest is the way to go.

    Awesome vest, like the Atom LT Jacket.

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

    This is like a hoodless and armless version of the Atom LT jacket:

    Lightweight, very soft, lightly insulated, and sufficiently warm. Ideal for normal to brisk days, or layering on colder days. Unlike the other reviewer, I wear a medium Atom LT jacket and Rush jacket, but feel like the large Atom LT vest is a good fit. He was going for a "glove" fit, though.

    Search no further for a vest

    • Familiarity: I've put it through the wringer
    • Fit: Runs large

    Arc'teryx Atom LT Insulated vest is very light and warm, at times I dont even feel wearing it so light it is. It does not protect from a cold wind, but works great as an insulation layer under windstopper hard/soft shell. A vest sizing is larger then expected. I normally wear size Large in Arcteryx, but vest in Large felt bulky around the waist area. Exchanged to size Medium for a more "glove" fit. Overall its a 5 star vest, totally recommend it.

    How does the atom lt compare to the Patagonia nano air vest both in warmth and breath ability?