Built to excel in all conditions and environments, the Ultra 109 GTX utilizes a Gore Tex waterproof, breathable membrane, durable UltrATAC outsole, and robust toe cap for maximum protection from Mother Nature's worst. . TPU Snake Plate at forefoot for protection from stone bruising. ESS midfoot shank for midfoot torsional rigidity. UltrATAC rubber outsole for excellent wetdry traction for all terrain and all conditions. Compression molded EVA midsole for shock absorbing cushioning and stability. Gore Tex Extended Comfort Range waterproof, highly breathable membrane. Breathable mesh upper. PU coated leather upper midfoot support. Protective TPU toe cap. Fitlast: Semicurved stability last has fitted, no slip heel, medium volume instep, generous forefoot volume and width.