Tall-height, nylon upper with locking snow collar to protect from the elements. D-Ring front lace fastening system for secure comfort. Faux-fur lining. Premium Rubber base for flexible durability. GelFlex™ anti-fatigue midsole for shock absorption. Removable Tri-Fit multi-layer inner boot system featuring PolyWick™ lining for moisture transfer and evaporation outside of fabric. Tundra Rated For Frozen and Snow-Covered Terrain.