Arc'teryx  Proton LT Vest - Men's

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Sizing chart
Runs Small
Runs Slightly Small
True to Size
Runs Slightly Large
Runs Large

Sleek & Functional.

Clocking in at only 245-grams, the men's Proton LT Vest is an exceptionally light, airy, and warm Arc'teryx softshell. Its intended for use as a cool weather standalone or as a mid layer under a hardshell during alpine activities. It derives its warmth from a padding of ultra-light Coreloft™ Continuous 65 insulation. A Fortius™ Air 40 outer fabric balances wind and water resistance with air permeability, for all day comfort across a range of conditions. Arc'teryx equipped the Proton LT vest with two insulated hand warming pockets and gave it a convenient zippered chest pocket. It's collar height provides ample coverage and warmth. A No Slip Zip™ front zipper prevents self-opening during physical activities. The hem has dual adjusters that tighten to block out cold drafts.

  • Coreloft™ Continuous 65 insulation
  • Fortius™ Air outer fabric
  • Collar height provides coverage
  • Dual hem adjustments
  • Arc'teryx Ascent Collection
  • Weighs 245-grams
  • Trim-fit, hip-length


  • [exterior] Fortius™ Air 40
  • [lining] Permair™ 20
  • [body] Coreloft™ Continuous 65 (65g/m²)
Water Resistance
  • Yes
Wind Resistance
  • Yes
  • Trim, hip length
  • 2 insulated hand pockets, 1 chest pockets
  • 230 g
  • Centre back length: 29.5" / 75 cm
Recommended Use

  • Alpine Skiing, Backountry Touring, Winter Trekking, Winter Activities, Snowboarding, Urban Winter Activities

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