Arc'teryx Proton Hoody

The Proton Hoody is a breathable synthetic insulated jacket engineered for high-output mountain days in cold conditions. Built around an air-permeable Fortius Air 20 face fabric, it balances weather resistance, stretch and durability while letting excess heat and moisture escape. Inside, 100% recycled Coreloft Compact insulation delivers lightweight, packable warmth that keeps performing even when damp, and a PFAS-free DWR finish sheds light moisture.

Whether you're climbing, working through alpine terrain, or lapping the resort and chasing freeride lines, the articulated patterning and helmet-compatible insulated StormHood move with you without bulk. The fitted cut layers cleanly under a hardshell or over a baselayer, while zippered hand pockets and a chest pocket secure essentials. The construction is Fair Trade Certified and uses bluesign-approved materials, making this hoody as responsible as it is versatile.