I-90 DuraShocks Waterproof Insulated Steel Toe 6" Work Boot SPECS & TECH Waterproof nubuck leather upper looks and feels premium 200-gram Thinsulate insulation adds warmth Feet stay dry with water-sealing direct-attach construction and patented, long-lasting Dri-lex sweat-wicking lining Removable double density footbed adds cushioning and stability Tough, lightweight polyurethane midsole Fiberglass shank stabilizes foot, weighs 75% less than steel and reduces fatigue Energy-returning Wolverine DuraShocks polyurethane outsole ASTM F2413-18 M I/75 C/75 EH rated steel toe Backed by Wolverine's 30-day comfort guarantee