The Premium Knee rubber work boot is perfect for a muddy, grimy jobsite. These boots are made of the ZXT rubber compound, which is waterproof, ozone resistant, and has a high-tensile strength for durability. An extra protective rubber toe cap and shovel guard further enhance durability and a removable EVA insole provides cushioning comfort. The steel toe and steel midsole meet or exceed ASTM F2413-11 M I/75 C/75 EH PR. The Trac-Lite&trade slip-resistant outsole delivers all-around traction in mud, snow and other loose terrain, and the contoured heel prevents slippage and provides a more secure fit.