Engineered using true US sizing for superior fit with excellent weight distribution for all-day comfort. AR 670-1 compliant flesh-out cattle hide upper/1000D nylon upper. Friction-resistant speed lacing system with 550 paracord lacing. Arch design resists wear from ladders and fast-roping. Open cell air mesh foam provides full foot air circulation for maximum comfort.. Oil- and slip-resistant rubber outsole for excellent traction and impact absorption. NTOA member tested and approved. FREE optional fit inserts included