Alpha Switch: the MacGyver of Jackets. Our Alpha Switch Series is the ultimate reversible, insulated multi-tool for your outerwear quiver. Solid DWR stretch softshell on one side, quilted DWR ripstop nylon on the other side. In between, it's layered with 80gm of continuous Polartec Alpha insulation. Perfect for boot-packing up Old Glory then kicking it back down. Qtr Zip features 5 pockets and 11" reversible zipper. Softshell: 90% poly/10% spandex, Ripstop: 96% nylon/4% nylon. Declassified: Polartec Alpha was developed for U.S. Special Ops Forces to be more breathable and dry 60% faster and than other synthetic insulations.