100% Waterproof Commercial Grade providing a slightly wider fit Dual-density extreme comfort insole with built in channels help keep feet cool, dry and comfortable SRC-Rated Outsole provides the best slip resistance available and is non-marking and oil-resistant Since the boot is built slightly wider, we recommend half sizes order down a size Reinforced Upper at Toe, Heel and Pull-On Tabs for maximum durabilityVendor Style Number: XMW-900