Arc'teryx Men's Proton Hoody - Winter 2026/2027

Breathable warmth for climbing and high-output mountain activities. Made for climbers - but not limited to rock and ice - the Proton Hoody is the go-to breathable insulation layer for high-output mountain missions. 80gsm Coreloft(TM) Compact insulation works with the air-permeable face fabric and liner to regulate temperature and vapour build-up. The Fortius Air 20 nylon shell is light and durable, articulated patterning removes restriction, and a helmet-compatible insulated hood extends the warmth.