Our Men’s Extremes® zip-to-waist biberall is water-repellent and designed for the coldest conditions. Made of 1000-denier Cordura® nylon, it’s lined in arctic-weight 100% quilted nylon polyester. It features a zipper front and leg zippers that zip to the hip and are covered with snap close wind flaps. It also has double knees with cleanout bottoms to accommodate knee pads and zippered hand pockets.