The Tactical Research TR636Z CT Maintainer Side Zip Composite Toe Boot is the newest addition the Tactical Research family. This boot features a side zipper for quick entry/removal and stain-resistant smooth cowhide leather for a sharp appearance all the time. The composite toe makes this one of the lightest safety boots that we carry. It is electrical and impact ANSI compliant and features Belleville's patented TR-1 orthotic Insole for maximum comfort. This boot is also Airman Battle Uniform (ABU) Approved. Features Men's Hot Weather USAF Maintainers Military Boot -U.S. Air Force ABU Approved -Spacious, Non-metallic Composite Toe -Smooth nonporous leather cleans up easily -Convenience Side Zipper -Lighter Weight than Traditional Steel Toe -Does Not Conduct Heat or Cold -Composite Toe Meets ASTM F2412-05 & F2413-05 for Impact/Compression and Electric - Rough-out cowhide leather & nylon fabric upper - Soft, shock-absorbent EVA midsole - Long-wearing, oil & slip resistant outsole - TR-1 premium load bearing orthotic insole - Non-metallic, spacious composite toe - ASTM F2412-11 and F2413-11 certified - Electrical Hazard rated boot - Highly breathable Air Mesh moisture-wicking lining - 8in standard military height - Meets uniform requirements for wear with ABU