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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

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Here's what others have to say...

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

Best Answer


It depends on the boot but my size small Atom LT pants fit over my Salomon Quest Pros and Dynafit Khions with ease.

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

Best Answer

They do not Robby. Just the elastic waist band.

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

Bill Porreca




  • Gender:Male
  • 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.

they are a mid layer so they aren't made for what you did in them

Yes to be fair I agree I did push their intended use boundaries a bit. but at least we now know what they can withstand.

Yeah, the MH Compressor pants are definitely more durable and versatile, but also nearly twice the weight, for probably the same warmth. OR Thermoplume pants are between the two.