Workboot performance with athletic personality, this style is comfortable and casual workwear at its finest. Flexible, lightweight and easily worn outside of work. For guys who need a work boot, but want anything but. ASTM F2413-11. Nylon Mesh with Direct Inject PU upper. Nylon Mesh Lining. Open Cell PU Foam Sock Liner. Dual Density EVA Midsole. Strobel/Cement Construction.