Metro Air 9" Side-Zip Uniform Duty Boots - Black This boot uses "air" technology to increase the level of comfort and cushioning for long shifts on the hard surfaces of the urban battlefield. Equipped with only non-metallic components, the Metro Air 9" Side-Zip is the ultimate airport-friendly law enforcement uniform boot. Details YKK Side-Zipper Airport Friendly. ◾Metro durable, non-marking rubber outsole with waffle traction and ladder grip control ◾Stitched heel and toe for durability and increased service life ◾Custom-molded phylon EVA midsole for lightweight comfort and cradled support ◾Texon stability platform for lateral support and torsional rigidity ◾Airport friendly nylon shank for lightweight support and fatigue control ◾Polishable leather toe ◾Leather / 1000 denier nylon upper for improved durability and comfort ◾Double-stitched upper with 3-ply bonded nylon thread for extended durability ◾Custom-molded thermoplastic heel counter and toe box for instant comfort and lateral support ◾Foam padded collar and tongue for protection and increased breathability ◾Non-metallic rust proof hardware ◾PU collar for easy cleaning ◾Removable custom fit EVA insole ◾Gusseted tongue to keep dirt and debris out ◾YKK® side-zipper for easy on and off fit with Velcro® closure 43 oz. (1219 g)