Arc'teryx Atom LT Pant

1 review
5-star:   1
4-star:   0
3-star:   0
2-star:   0
1-star:   0


Sizes XS, S, M, L, XL, XXL
Weight 355 g / 12.5 oz
Fit Trim fit
Materials Coreloft™ 60 gm / sq m insulation, Luminara™—Nylon weave fabric with wind and water repellant coating



Every bit as good as the jacket, packs down even smaller.

Rating: rated 5 of 5 stars
Source: bought it new
Price Paid: $190


Every bit as good as the jacket, packs down even smaller.


  • Lightweight
  • Warm
  • Packable


  • Expensive

Enough has been said about the Atom LT Jacket and as soon as I became acquainted with how amazing it is, I picked up the pants. The combo went with me on a 4-night survival training course recently (Haley Strategic Partners Summer Mountain Problem Solver).

We all slept in pine-bough shelters down to 45 degree rain so pretty much everybody was cold . . . except me.  I don't think my shelter was so far superior to everyone else's, I think it was the Atom LT jacket and pants that I wore under my rain gear as I slept. Wearing the combo is truly like having a sleeping bag and you barely notice them in your pack at all.  

The pants have full zippers and cinch up tight at the ankles.  they have a small pocket in the waistband which works well as a stuff sack.  This combo is unbeatable for lightweight, packable warmth.

Manufacturer's Description

Visit Arc'teryx's Atom LT Pant page.

Retailers' Descriptions

Here's what other sites are saying:

The Arc'teryx Atom LT Pant is designed to keep you warm on the coldest days, or as an extra outer layer when belaying or during low activity moments in the mountains.


The Arc'teryx Atom LT Pant is a lightweight, synthetic, insulated pant featuring the all new Tinthan(TM) fabric. Moisture-resistant outer face fabric Breathable Insulated Lightweight Compressible and packable Wind resistant

- OMCgear

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.


Free Shipping. Arcteryx Men's Atom LT Pant FEATURES of the Arcteryx Men's Atom LT Pant Light, soft face fabric has DWR finish to repel moisture and good air permeability for active use Warm and resilient synthetic Coreloft insulation Fully articulated knees and seat for optimal range of motion Fully separating side zippers with laminated windflap allow for easy removal over boots and crampons Stuffs into its own hanging pocket for easy storage SPECIFICATIONS of the Arcteryx Men's Atom LT Pant Weight: 11.6 oz / 330 g Trim fit Tinthan - 100% nylon Coreloft 60 insulation (60 g/m2) This product can only be shipped within the United States. Please don't hate us.

- Moosejaw