These insulated coveralls are filled with 4 ounces of polyester fiberfil insulation to guard against the cold and are laminated with Dupont Teflon for ultimate water resistance. A stand-up collar keeps the wind off your neck, while two back pockets give you plenty of space for storage. The full front zipper, elastic at side waist and knee-length leg zippers allow you to easily slip the coveralls over other layers.