After almost getting frostbite on a climb of Aconcagua, Swamy Karnam knew there had to be a better layering system for use in cold environments that would give you easy access to inner layers for keeping your hands, camera, or water from freezing. The resulting Cozy Layers Passage System consists of four layers of upper-body apparel (base layer, fleece, down jacket, and shell) that work seamlessly together.