Seam-Sealed Waterproof Leather Uppers For Durability And Dry, Comfortable Feet. Direct-Inject Construction For Durability. Padded Top Collar For Comfort. Lightweight Blown-Thermal Plastic Midsole For Flexibility And Cushioning. Nylon Shock-Diffusion Plate For Support And Torsional Rigidity. Thermolite 400G Insulation Keeps Feet Warm. Open-Cell Polyurethane Foot Bed.