100% waterproof and breathable GORE-TEX liner is engineered to keep your feet dry and comfortable - even in extreme conditions. 400 grams of Thinsulate Insulation offer lightweight warmth for those needing protection in cold climates. Danner's rich, full-grain leather gives comfort and superior durability on the job site. Non-metallic toe is lighter than steel and meets or exceeds ASTM F2413-11 M I/75 C/75 EH standards. Electrical hazard (EH) footwear is manufactured with non-conductive electrical shock resistant soles and heels.