Our First Ascent guide team built these insulated alpine pants for mountaineering in cold conditions. They'll keep you warm at base camp or on the final push to the summit. Lightweight, compressible ripstop nylon shell packs easily, and the ultra-warm Primaloft Gold insulation offers warmth even when wet.

• 1.2-oz 20D Ripstop Nylon Shell StormRepel® DWR finish sheds moisture so it doesn't soak in
• Reinforced Knees and Seat 2-layer 5.36-oz 70D nylon oxford is 10K/10K waterproof/breathable
• 100G PrimaLoft® Gold Insulation Premium synthetic material for superior performance in all weather
• Integrated Belt Ensures secure fit