Arc’teryx Gamma Lightweight Hoody Dk Stratus. Crafted from Fortius™ 1.0 softshell fabric, the Arc’teryx Gamma Lightweight Hoody is built for movement across changing terrain and warmer conditions. Wind resistant, water repellent, and highly breathable, the lightweight construction combines stretch comfort with UPF 50+ protection and recycled nylon content. The regular fit is patterned for unrestricted mobility, while the quick-adjust StormHood™ delivers coverage without limiting visibility. Designed as Arc’teryx’s lightest Gamma hoody, it works equally well as an outer layer or part of a technical layering system.