5.11 Men's Speed 4.0 Soft Toe 8in Work Boots - The new Speed 4.0 8in Side Zip comes equipped with polishable leather uppers reinforced with nylon for durability. Force Foam heel cushioning, an Ortholite footbed, and a high-abrasion mesh tongue make sure your feet are feeling good no matter the job. The ASTM slip-resistant outsole and heat deflecting layer work together so you don’t feel the heat when your feet hit the street. Polishable leather upper High abrasion mesh tongue for added breathability Ortholite footbed YKK side zipper with velcro zipper tab Nylon upper for added durability 5.11 heat deflect insole layer for deflecting radiant heat from the ground ASTM Slip-resistant rubber outsole Polishable Leather & Nylon upper Style: 12454ABR