Waterproof full-grain leather upper. Patented, long-lasting Dri-lex® lining wicks away sweat and keeps skin dry and comfortable. 200-gram Thinsulate™ Insulation adds warmth. Removable double density footbed adds cushioning and stability. Wolverine DuraShocks® lightweight polyurethane outsole. Permanent direct-attach molding seals out water. Fiberglass shank stabilizes foot, weighs 75% less than steel and reduces fatigue.