The Gamma-Shell AR is a 3-layer waterproof/windproof hardshell built for serious mountain weather. A durable laminate, fully taped seams, and a helmet-compatible storm hood keep wind and rain out, while a membrane manages moisture vapor during high-output climbs. It is the protective outer layer for alpine objectives and exposed terrain.

Specifications

Construction & Features

• 3-layer laminate construction for durable waterproof/breathable protection
• Fully taped seams and weather-sealed zippers keep water out
• Adjustable, helmet-compatible storm hood for full-coverage protection
• Articulated patterning through the shoulders and arms for unrestricted reach
• Adjustable hem and cuffs to seal out wind-driven rain
• Zip pockets positioned to remain accessible under a pack hipbelt

Intended Activities

Mountaineering — Weatherproof outer layer for high-altitude objectives.

Alpine hiking — Reliable protection when ridgeline weather turns fast.

Wet-weather travel — Durable shell for unpredictable forecasts.

Layering system — Outer shell over insulation in cold, stormy conditions.

Fit & Sizing

Cut to a regular fit with articulated patterning, leaving room to layer insulation underneath. If you plan to wear a thick fleece or mid-layer beneath the shell, consider sizing up. Available S through XXL. Refer to the product image gallery for the size guide.

Frequently Asked Questions