Product details:

The Arc'teryx Proton FL Hoody balances air permeability and thermal protection during summer alpine and rock climbing, giving comfort over a wide range of temperatures, conditions and output levels. The Fortius Air 20 fabric has light wind resistance and air permeability, while Octa Loft breathable insulation maintains a comfortable micro climate. A low profile, fitted, adjustable hood is uninsulated to fit well under a helmet but still give wind protection. Featured with two zippered chest pockets and two zippered handwarmer pockets. PROTON: Air-permeable midlayer insulation with abrasion- and weather-resistant outer surface. FAST AND LIGHT: Minimalist, high performance and lightweight, for rapid travel in variable conditions.