This Carolina boot is the whole package. With this waterproof, insulated, steel toe boot, with a rugged welt construction and steel shank, you'll be ready for any job. With a tough lug tread, you will have plenty of grip. This boot is ready to work. Electrical Hazard - Footwear tested by an independent lab that can withstand applications of 18,000 volts at 60hz for one minute without leakage. Slip Resisting - Soles designed and constructed with materials to meet the standard for slip resistance. Steel Shank - A thin piece of metal built between the insole and outsole of the boot that helps provide stability, structure and support. Waterproof - Carolina’s Exclusive Proprietary Waterproof Lining System. Waterproof Scubaliner™ - Carolina’s Exclusive Proprietary Waterproof Lining System Pillow Cushion™ 1 Footbed - A layer of memory foam that wraps the foot in comfort. Combined with existing insole systems, it offers the ultimate in cushioned comfort.