The Belleville 600 Hot Weather Combat Boot is a great Air Force-compliant option. Built from cattlehide leather and nylon, the 600 is a good balance between durability and ventilation. The running shoe style design makes the boot comfortable for long long days on the flight line. VIBRAMA(R) Sierra soles keep you steady on a variety of terrain.BOOT FEATURESHeight: 8" (Standard Military Height)Upper: 100% cattlehide leather & nylon fabricMidsole: Highly cushioned, shock absorbent midsoleOutsole: 100% rubber VIBRAM SierraInsole: Single density molded removable insertSPECIAL FEATURESVANGUARD running shoe sole constructionDrainage vents to increase ventilation