USMC certified with EGA. Durable, nubuck leather upper with lightweight 1000 denier nylon. Breathable, moisture-wicking mesh lining in the HOT and Aviator ST. The GTX has a GORE-TEX waterproof, breathable lining. Speed lacing system, PU footbed, and fiberglass shank. Vibram 360 outsole with Dri-Ice compound. 8' tall. Sizes 5-16 including half sizes. Regular and wide width. Made in the USA MEB Boot Hot Mojave