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. Features: 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 YKKA(R) side-zipper for easy on and off fit with VelcroA(R) closure