Flash and water-resistant leather uppers withstand fire hazards and the rigors of sea-to-land warfare. 1000 denier Cordura nylon sides and padded collars. 1000 denier Cordura nylon in sides and panels is treated with PTFE coating for flame resistance. Aegis Microbe Shield prevents bacteria and fungus growth that cause rot and foot discomfort. Wicking Dri-Lex lining and stretch lycra tongues hug feet for secure fit. SuperFabric instep panels prevent early boot failure from rope burn. The super-tough material resists cuts, abrasions, punctures, animal bites and rot. Drainage vents move water out and prevent debris from entering and enhance breathability. Proprietary high-walled Vibram soles with perforated airport cushion footbed and PU midsoles are supportive and stitched to each upper for maximum durability. Panels in the uppers are also triple-stitched for durability. Made in USA, Berry compliant.