Waterproof nubuck leather upper looks and feels premium; 200-gram 3M Thinsulate insulation adds warmth; Permanent direct-attach molding seals out water; Patented, long-lasting Dri-lex lining wicks away sweat for dry comfort; Removable double density footbed adds cushioning and stability; Tough, lightweight polyurethane midsole; 75% lighter than steel, fiberglass shank stabilizes foot and reduces fatigue