A truly multi-functional boot for all your work needs. Combination leather and nylon uppers. Front lace with a side zip for easy on/off. Mesh lining for breathability. Featuring a midsole with a removable disk, allowing for a four zone control. Set the dial to the Firm Zone for energy return, the Cushion Zone for increased shock absorption, the Outward Zone to reduce outward tilt and maximize natural walking motion and the Inward Zone to reduce inward tilt and maximize natural walking motion and stability. Cement construction. Slip-resistant rubber outsole for durability and safety. Measurements: ; Weight: 1 lb 7 oz ; Circumference: 12 in ; Shaft: 5 1 2 in ; Product measurements were taken using size 7, width D - Medium. Please note that measurements may vary by size.