Belleville 610zST Sage Green Hot Weather Steel Toe Tactical Boot w/Zipper canvas Rubber sole Shock Absorbent MeraMax dual density all polyurethane sole system to provide longer wear and increased traction. Zipper Boots offer the YKK coil zipper & Steel Toe Models meet ASTM F2412-05 and F2413-05 Standards. U.S. Air Force Uniform Approved Height 8" & Stylish, Tactical Design Vents for Draining and Cooling & Padded Tongue and Collar for extra comfort.