Action leather / 1000 denier nylon upper with polishable heel and toe YKK side-zipper in durable Vislon pattern for easy on and off fit with hook and loop tab-stay closure Double-stitched upper with 3-ply bonded nylon thread for extended durability Foam padded collar and tongue for protection and increased breathability PU collar for easy cleaning Gusseted tongue to keep dirt and debris out 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.