This #8 Grey is designed to use in mining and industrial areas. Upper sole is made from PVC and nitrile compound that offers added strength and water resistance. Metatarsal pad offers good cushioning on the metatarsal bones of the body thus decreasing stress on the pressure points. Midsole is made from strong steel that prevents any sort of penetration. Heavy tread base allows more stability while walking and the sole design gives added grip on demanding surfaces.