Heel Height: Approx. 8'' Tall. 100% waterproof and breathable GORE-TEX liner is engineered to keep your feet dry and comfortable - even in extreme conditions. Durable full-grain leather upper plus breathable 9000 Denier nylon for excellent durability and abrasion resistance. 400 grams of Thinsulate Insulation offer lightweight warmth for those needing protection in cold climates. Cushioning polyurethane footbed.