Boot Height: Approx. 8'' Tall. 400 Gram Thinsulate Ultra Insulation. Air-port cushion footbed circulates air with every step. ASTM F2413-05 Electrical Hazard Standard. ASTM F2413-05 I/75 C/75 Protective Toe Classification. Durably Waterproof and Breathable Gore-Tex Fabric. Full-Grain Leather and durable nylon. ProLight outsole provides excellent traction on uneven surfaces.