A great extra layer, carhartt's duck vest is made of 12-ounce, firm-hand, 100 percent ring-spun cotton duck. For warmth, it features a nylon lining quilted to arctic-weight polyester insulation, plus a rib-knit collar and, in back, a drop tail. Other features include a front zipper with wind flap, a convenient inside patch pocket with hook-and-loop closure, and front hand-warmer pockets.