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Arc'teryx - Proton LT Vest - Men's

Arc'teryx Proton LT Vest - 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 Vests we have in stock.

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Tech Specs

Fortius Air 40 (92% nylon, 8% elastane), Permeair 20
65g Coreloft Continuous
Center Back Length:
2 insulated zippered hand, 1 chest zip
Claimed Weight:
Recommended Use:
hiking, ice climbing, mountaineering, climbing
Manufacturer Warranty:

Proton LT Vest

Move through the mountains quickly with the help of the Arc'teryx Men's Proton LT Vest. It's designed to provide the optimal balance of warmth, weather protection, mobility, and breathability so you stay comfortable on everything from rapid-fire backcountry skiing laps to crisp fall days at the crag.

Air-permeable Fortius Air 40 fabric allows excellent breathability so you don't overheat or get drenched with sweat on tough ascents, and it still keeps frigid gusts from sapping all your warmth. It's also stretchy for freedom of movement when skiing technical lines or reaching for tough holds. Coreloft insulation provides low-bulk warmth, and a DWR finish helps the outer fabric repel light rain and snow. When you're adventuring in brutal winter conditions, the trim fit and low-profile fit allows you to comfortably layer this vest under a technical hardshell.

  • Regulated comfort made for moving in the mountains
  • Stretchy and highly breathable fabrics for mobility
  • Coreloft insulation is low-profile and lightweight
  • Trim fit layers comfortably under a shell
  • DWR finish repels light rain and snow
  • High collar protects your neck
  • Drop-back hem for extended coverage
  • Insulated hand pockets keeps phone from freezing

My favorite vest.

  • Familiarity: I've used it several times
  • Fit: Runs small
  • Size Bought: XL

Great Arc'teryx quality. Very trim fit. I have a very chubby belly. Very lightweight. Perfect to stay warm. A great addition to a Arc'teryx collection.


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

I bought this for my husband and it is a really nice looking vest. He tends to run hot so this is a good alternative to a lightweight jacket because he can wear a light fleece underneath and stay plenty toasty outside with this.