Engineered using true US sizing for superior fit with excellent weight distribution for all-day comfort. Polishable full grain leather/1000D nylon upper. Triple row reinforced stitching. YKK side zippers with zipper guard. 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. Breathable liner wicks and regulates temperature, treated with Aegis to prevent odor. Premium memory foam insole. Oil- and slip-resistant rubber outsole for excellent traction and impact absorption. NTOA member tested and approved. FREE optional fit inserts included