The Gamma SL Hoody is the result of years of Arc'teryx softshell experience and our designers' extraordinary focus on purity of function. It is a pinnacle piece combining advanced performance and a clean, minimalist aesthetic. The Fortius 1.0 double weave is light, but strong. It resists wind and water, breathes, and offers four-way stretch. A StormHood provides protection without impacting peripheral vision, while the trim fit, articulated patterning and clean lines keep it streamlined and comfortable.