Belleville Waterproof Flight Boot - USAF Green Leather Shaft measures approximately Mid-Calf" from arch Full Grain Cowhide Leather And Nylon Fabric Upper For Durability And Breathability Vanguard Sole Construction Combining A Cushioned Direct Injected Midsole With A 100% Rubber Vibram Sierra Outsole Gore-tex Waterproof Fabric Bootie Soft Removable Insole For Cushioning U.s. Air Force Flight Approved