The Carhartt Extremes Zip-to-Waist Biberall is arctic quilt lined, water-repellent and designed for the coldest conditions. Made of 1000-denier Cordura nylon shell with 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. *1000-denier Cordura heavyweight insulation* Water-repellent * Double knees with cleanout bottoms.