Ahnu Women's Sugarpine WP-W Boot 100% Leather and Textile Imported Synthetic sole Waterproof, breathable technology Vibram non marking outsole and slip-resistant lugs provide grip and traction on varied surfaces Numentum hike technology with a lateral to medial thermoplastic polyurethane heel clip for neutral positioning and stability Shock dispersal plate in forefoot for stone bruising protection Gusseted tongue helps keep debris and dirt out