Heel Height: Approx. 8'' Tall. Made in USA. 400 grams of Thinsulate Ultra Insulation offer lightweight warmth for those needing protection in cold climates. Rough-out Leather and 1000D nylon upper for superior protection and comfort. 100% waterproof and breathable GORE-TEX liner is engineered to keep your feet dry and comfortable - even in extreme conditions. Polyurethane footbed provides superior shock absorption. TERRA FORCE X platform for a lightweight fit with durability, traction, and maneuverability.