Designed for versatility and confidence, these black leather and performance air mesh nylon side zip boots feature a rugged lug, dual-density Z-Trac outsole. The BBP Waterproof Membrane protects against dangerous fluids, and the composite shank provides extra arch reinforcement. The removable polyurethane SHOCK ZONE footbed ensures comfort. Made in the USA with USA and globally sourced components. Full-grain leather/400g air mesh. BBP Waterproof Membrane. Removable SHOCK ZONE polyurethane footbed. Composite shank. Z-trac ASR outsole. Cement construction. ASTM F1671/1671M-13. ASTM F1677-05. ASTM F2913-11. Meets ASTM F2913 Slip Test Standards.