Free 2-Day Shipping on Orders Over $50*

Detail Images

  • Arc'teryx - Waist
  • Arc'teryx - Atom LT Insulated Pant - Men's -
  • Arc'teryx - Waist -

Current Color

  • Arc'teryx - Atom LT Insulated Pant - Men's -

Arc'teryx Atom LT Insulated Pant - Men's

Temporarily Out Of Stock

Don't get too bummed. This item is on the way and will be available for purchase as soon as it rolls into the warehouse.

Can't wait? Consider one of the other Men's Down Insulated Pants we have in stock.

View Similar Products

6 Reviews


Compressible lightweight warmth whenever your legs need it.

Layer Arc'teryx's lightweight Atom LT Insulated Pant under your hardshell the next time you want toasty warmth in the alpine. Coreloft insulation brings the warmth without the weight in a compressible package so you can stow the pant in its pocket when you don't need it. The Tinthan shell has a DWR coating for water-resistance in case you don't want to wear the Atom LT as a midlayer. An articulated construction makes sure you can climb and ski with a full range of motion. Arc'teryx also added full-length side zippers so you can get in out and of these pants with crampons and boots on.

  • Tinthan shell with DWR coating
  • Coreloft synthetic insulation
  • Trim fit
  • Articulated knees and seat
  • Full-length side zippers
  • One stow pocket
  • Item #ARC004I

Tech Specs

Tinthan nylon, DWR treatment
60g Coreloft
1 internal stow
Side Zips
yes, full-length
Claimed Weight
11.6 oz
Recommended Use
Manufacturer Warranty

Tech Specs

  • Reviews
  • Q & A

What do you think about this product?

Have questions about this product?

Winter Essential

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

Throw these over your jeans anytime the temp is 25 or less and your butt will thank you. Not meant to deal with abrasion, these are not shell pants people. However as far as warmth I have used these from 25 to -10 and they kept my legs warm just fine even out walking to the store. They also are easy to remove and put on with the side zippers and they stash in their own pocket. Awesome work Arc'teryx!

I live in these all winter

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

I bought these pants to wear under my shells on cold storm skiing days but I find myself wearing them around the house (and public) like sweat pants. Great for camping, casual use and just anytime you don't want your legs to be left out of the warmth. Why did I never think of getting a jacket for me legs sooner?


  • Familiarity: I've used it several times
  • Fit: Runs large

I use them like sweat pants in the winter. You can throw them on and wear them to the grocery store if your lazy like me that works well. I also like them for those rare days when a base layer is not enough on the legs up on the hill.

Fantastic mid layer

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

Borrowed my neighbors set to do some skiing and I just had to buy a pair myself. Bought these for cold days on the mountain when that extra layer is needed. Have taken them out on the slopes as well as some hiking activity.. warm and cozy is definitely true.. almost too warm and cozy but they have been a great layer to add than what I previously had. The inner pocket is useful, the full length zippers work well. No complaints so far when treated as a mid layer.


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

After buying these to take on a recent NZ mountaineering trip. I wore them on a multi pitch mixed alpine route one day and they got all ripped and torn up pretty bad. The outer material is very prone to be torn easy. these might be better suited to only wearing them as BC or in the hut not recommend to be climbed in. I now own a pair of MH Compressor pants that have reinforced bum and knees.

Will the bottom hem of these fit over an alpine touring boot?

Do these hava an adjustable waist (string, velcro, etc)?