Design: Alaska proven functionality and durability Triple-dipped neoprene shell for extra tough, extra watertight protection 100% waterproof construction In-Shoe Comfort: Durable light weight lining gives boot structure without sacrificing flexibility Breathe-O-Prene® cushioned insole with arch support helps fight fatigue and stress on the legs and back Durability & Traction: Slip-resistant, non-marking outsole for the best traction on wet surfaces Additional Details: Acid chemical resistant Recommend half sizes order up to the next full size