The Flex is built on DEWALT's newest outsole with a rugged all leather upper. Features a ProComfort shank and ProComfort insole. Lightweight at 630G. Features a padded tongue for comfort and a 3/4 tongue gusset to keep out dirt and debris. Dri-Lex DL aerospace mesh lining for comfort and breathability, and a leather covered soft padded collar for a secure fit. The ProComfort insole features an ergonomic arch support, a layer of memory foam for comfort, and a quick recovery polyurethane bottom layer. Treated with Dewalt's Agion antimicrobial silver technology to help eliminate odor. Includes electrical hazard protection, oil and slip resistance, and a 30-day comfort guarantee.