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. 800 grams of Thinsulate Ultra Insulation offer lightweight warmth for those needing protection in cold climates. Stitchdown construction provides a wider platform for increased stability underfoot. Cushioning polyurethane footbed. Secure, fast, flexible lacing system provides enhanced fit. Lightweight, non-loading Vibram Hunter outsole features a unique tread pattern for superior traction.