One word: Tough. Introducing the all-new Danner Air Force Hot boot, certified by the United States Air Force. This boot features a military-standard Vibram 1276 outsole with stitchdown construction for a more stable platform underfoot and superior durability. Lace to toe gives better fit and support. Rough-out full-grain leather provides all the toughness you expect out of a Danner. The Dri-Lex lining offers rapid drying and air exchange to mitigate hot weather. This is the perfect boot for those who rule the sky. Dri-Lex lining provides excellent vapor transport, is extremely quick drying, is completely breathable, resists odor and mildew in hot weather. Vibram 1276 Sierra outsole matches the color of our olive rough-out leather and fabric. The specific design and placement of the multi-directional lugs offer maximum traction and stability over various terrains, including wet and cold conditions. Stitchdown construction provides a wider platform for increased stability underfoot. Rough out, full-grain leather upper offers serious protection and toughness and is designed specifically for hot weather conditions, providing mildew resistance, breathability, and low water absorption. 1000 Denier nylon upper material is extremely resistant to abrasions, tears, and scuffs, improves breathability, and dries quickly. 8 inches of support and stability.