100% waterproof rubber work boot. Ideal for wider calves with Stretch-fit topline binding that snugs calf to keep warmth in and cold out. 5mm Neoprene bootie with 4-way stretch nylon. Triple-reinforced in the toe and quadruple reinforced in the heel for durability. Features a built-in Airmesh lining to keep feet ventilated during the entire day. Includes a blown rubber outsole. Oil resistant and shock absorbent, and includes a steel shank for additional arch support.