Waterproof leather upper. Nylon mesh lining. Removable,perforated EVA with Gel Technology insert for comfort. High performance rubber outsole. Insulated with 400 grams of patented thermal technology to keep your feet warm and comfortable. SRX best-in-class slip resistant outsole. ASTM F2413-05 I/75 C/75 steel toe. ASTM 2413-05 I/75 EH electrical hazard.