Gamma Jacket (Men's)


Size Guide
SKU: 286640

Weather resistant mid or outer layers with stretch. Highly breathable and abrasion resistant.


High performance, minimalist design that is durable for its weight.


Air permeable four-way stretch woven textiles with superior abrasion resistance.


Versatile high performance designs for diverse activities and conditions.

Versatile, durable softshell jacket providing breathable, weather-resistant performance.

Gamma Series: Softshell outerwear with stretch.
*The Gamma Jacket was previously the Gamma LT Jacket.

Inspired by climbing, then refined to expand its versatility, the Gamma Jacket works on rock, trail, and easily transitions to daily use. Made from a light, durable double weave, it blends wind and water resistance with breathable comfort. The clean, athletic fit allows room for light layers, and performance stretch gives you freedom to move. Born in British Columbia where the mountains meet the sea, this is a proven performer built to handle a range of conditions and landscapes.

Updated with a revised fit.

Gamma Jacket (Men's)

Size XS, S, M, L, XL, XXL
Weight 445g / 15.7 oz
Fit Regular
Model Measurements Height: 6'0"/182.9cm, Chest Width: 36"/91.4cm, Waist: 29"/73.7cm, Inseam: 31"/78.7cm
Wearing Size: Medium
Activity Hiking / Trekking / Rock Climbing / Alpine Climbing / All Round
Model X000007485
Manufacturing Facility Pt.Pancaprima Ekabrothers, Indonesia

Full Product Features

Technical Features

  • Moisture-resistant outer face fabric
  • Breathable
  • Highly durable
  • Wind resistant

Collar Configuration

  • Stand up collar
  • Laminated chin guard
  • Soft brushed-lined collar


  • Laminated high-strength hanger loop
  • Mechanical stretch textile for unrestricted mobility

Cuff & Sleeves Configuration

  • Laminated cuffs
  • Stretch gusset cuffs

Design & Fit

  • Regular fit provides freedom of movement with room for layers

Fabric Treatment

  • Arc'teryx Nu water repellent treatment

Hem Configuration

  • Drop back hem
  • Laminated hem
  • Adjustable hem drawcord

Logos & Label Configuration

  • Embroidered logo


  • Articulated patterning for unrestricted mobility
  • Gusseted underarms for mobility and comfort
  • Stretch wrist gussets

Pocket Configuration

  • Two hand pockets with zippers
  • Internal laminated pocket with zip


  • Contains materials that meet the bluesign® criteria

Zippers & Fly Configuration

  • Full length Vislon front zip with windflap
  • No Slip Zip™ front zipper

Fit: Regular

Our classic fit is cut comfortably throughout the chest, waist, hip, and thigh. It allows freedom of movement, provides shape, and layers comfortably over or under our layers.

Materials & Care


  • Self: Wee Burly Double Weave - 56% nylon, 34% polyester, 10% elastane - bluesign Approved Material


  • Machine Wash Low
  • Machine Wash Gentle Low
  • Tumble Dry Normal Low
  • Do Not Bleach
  • Wash Dark Colours Separately
  • Do Not Dry Clean
  • Iron Low
  • Do Not Use Fabric Softener
  • Double Rinse