Viking Footwear Water Jet Waterproof Boot 100% Rubber Importado High chemical and abrasion resistance. NBR rubber for maximum chemical protection. Oil-, chemical-, and slip-resistant NBR sole Reinforced backstay for heel/tendon protection. Steel shank and air cushioned sole pockets Adjustable nylon guard keeps out water and debris. Air moisture control socket for comfort. Heavy-duty cotton canvas lining AMC socks (VF22) included. Ultra flexible: Exceeds 305,000 Flex Rating Ideal for High Pressure Washing, Ship Cleaning, Bridge Stripping, Concrete Cleaning, Construction Sites