Injection molded PVC with Triple Density Technology (TDT) resists degradation from many harsh chemicals; seamless and 100% waterproof FOOT FORM contour cushion insole provides arch and heel support, and is removable, washable and replaceable; thick, wide steel shank supports the arch Dual-compound center sole offers cushioning and lasts longer; open pattern outsole self-cleans liquid and debris with every step; outsole perimeter is formulated for tough, long-wearing support Higher, wider kick-off lugs for easy on/off; reinforced at critical stress points for extended durability Recommended use: barns, general work, occupational