Arc'teryx Alpha SL Jacket Men’s

Guide Pick™: JJ Justman


Super lightweight, waterproof jacket constructed using GORE-TEX® fabric with PacLite® product technology and designed with essential backcountry features and helmet compatible StormHood™; ideal as an easily packable emergency storm jacket in an alpine environment.

Specs Sizing Reviews

Alpha Series: Climbing and alpine focused systems | SL: Super light

Alpine Light: Design, materials and build combine to make this the lightest alpine compatible Arc'teryx waterproof shell. The use of e3D patterning technology helps create a jacket that uses minimal materials to create a trim fit with enhanced freedom to move.

Packable Protection: N40r GORE-TEX® fabric with Paclite® technology is one of the lightest waterproof/breathable fabric we use. Highly packable, it features a mini-ripstop face for increased tear strength and an exceptional DWR treatment for a high level of initial water repellency.

Commitment to Details:  Innovative construction and patterning work with lightweight materials to shed grams. The 1.6 mm micro-seam allowance reduces weight and bulk, as does the use of 13 mm GORE® seam tape. Even the zipper pulls use an ultralight cord.

Performance Focused:  An ultralight shell that is all about minimizing weight and bulk without sacrificing advanced performance. It is thoughtfully designed emergency storm protection for fast and light alpine climbing, and works in tandem with the Alpha SL Pant to deliver the confidence to perform even in highly adverse weather conditions.

Technical Features

  • Waterproof
  • Snow-shedding
  • Windproof
  • Breathable
  • Lightweight
  • Compressible and packable


  • DWR finish (Durable Water Repellent) helps bead water from fabric surface
  • Micro-seam allowance (1.6 mm) reduces bulk and weight
  • Fully seam-sealed for waterproofness
  • Tiny GORE® seam tape (13 mm)


  • One-hand adjustable drawcords


  • Anatomical shaping for fit and comfort
  • Gender specific patterning
  • Articulated patterning for unrestricted mobility
  • Articulated elbows
  • No-lift gusseted underarms

Hood Configuration

  • Helmet compatible StormHood™

Collar Configuration

  • Laminated chin guard

Zipper Configuration

  • WaterTight™ external zippers
  • Zipper garages to protect zipper closure from snow and rain
  • Micro corded zipper pulls
  • WaterTight™ full length front zip

Sleeve Configuration

  • Laminated die-cut Velcro® cuff adjusters reduce bulk, and won't catch or tear off

Waist Configuration

  • Adjustable elastic waist drawcord

Hem Configuration

  • Laminated hem
  • Drop back hem
  • Harness HemLock™ inserts keep jacket in position under harness

Pocket Configuration

  • Chest pocket with WaterTight™ zip
  • Note: Our WaterTight™ zippers are highly water resistant, but not waterproof. We do not recommend keeping items in your pockets that may be damaged by moisture

Integrated Features

  • Includes stuff sack


Size Small Medium Large XL
Chest 38 40 43 46
Waist 31 33 36 39
Hip 38 40 43 46
Sleeve 33 34 35 36


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