The 16" Meta-Boot are made of 100% waterproof, ozone-resistant black rubber, with steel toe, steel midsole and full metatarsal guard that meets or exceeds ASTM specifications. Strong nylon net lining for easy on and off. Removable EVA insole for comfort. Trac-Lite outsole for grip on wet and slippery surfaces. Rigid, contoured heel counter prevents slippage for walking comfort. Fiberglass shank. The 16" Meta-Boot are used for mining, refining, heavy manufacturing, and processing.