Original S.W.A.T. Men's Metro Air 5 Inch Side Zip Tactical Boot Leather Imported Rubber sole Metro durable slip and oil resistant non-marking rubber outsole with waffle traction and ladder grip control meets the ASTM F2913-11 test for slip resistance YKK side-zipper for easy on and off fit with hook and loop closure Double-stitched upper with 3-ply bonded nylon thread for extended durability Leather / 1000 denier nylon upper for improved durability and comfort Airport friendly nylon shank for lightweight support and fatigue control