Approved for flight by the U.S. Army and U.S. Air Force, this Gore-tex lined waterproof boot is multi-functional and is perfectly suited for both air and ground combat use. The lace-to-toe design also allows for a better, customized fit for increased stability and support. Belleville Gore-Tex boots run about 1/2 size larger than your running shoe. For example, if you wear a size 10, consider trying a size 9.5. VANGUARD running shoe sole construction Durably waterproof and highly breathable GORE-TEX fabric AR 670-1 Compliant Specifications Height: 8" (Standard Military Height) Upper: 100% cattlehide leather & nylon fabric Midsole: Highly cushioned, shock absorbent midsole Outsole: 100% rubber VIBRAM Sierra Insole: Single density molded removable insert