Sleeves - Made From 50% nylon & 50% cotton. Chest & Back - Made from 40% Acrylic & 60% Cotton. Resists melting & dripping. Melting point is rated to 230 degrees Fahrenheit. Moisture wicking. Lightweight & breathable. Zippered sleeve storage pockets. Mock turtle neck. Anti abrasion padded elbow patches. Gusseted sleeves. Glint tape holder for IR tape. Loop on sleeve pockets for attaching name, rank and flag