Genuine Full Grain Leather with Rugged Pigskin. Breathable Waterproof Membrane with Moisture Wicking Mesh. Tough Yet Lightweight Polyurethane Midsole. Removable, Double-Density Footbed. Permanent Direct-Attach Construction Seals Out Water. Energy-Returning Wolverine DuraShocks SR Polyurethane Outsole. 75% Lighter Than Steel, Fiberglass Shank Stabilizes Foot.