Made in USA. Meets AR-670-1 requirements for optional wear. The 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. The 100% waterproof and breathable Gore-Tex liner is engineered to keep your feet dry and comfortable - even in extreme conditions. Space frame webbing design for increased mobility and flex in the upper. Speed lacing system for a secure fit. Polyurethane footbed provides superior shock absorption with an additional layer of open cell construction for improved air circulation. TERRA FORCE X platform for a lightweight fit with durability, traction, and maneuverability. Vibram Rivot TFX outsole offers superior acceleration, braking, pivoting, and traction in rugged terrains, featuring 360 degree pivot point lugs for pivotal movements and broad flat lugs in the toe, heel and outer edges of the outsole for traction against walls and rocks. 67 oz. The non-metallic safety toe won't conduct heat or cold to the foot, and meets or exceeds ASTM standard F2413-11 M I/75 C/75 EH. Electrical hazard (EH) footwear is manufactured with non-conductive electrical shock resistant soles and heels. Boot height: Approx. 8'' tall.