John Deere 6�� WCT II Waterproof Aluminum Alloy Safety Toe Work Boots; it stands for Work Comfort Technology. Add in a super-tough aluminum alloy safety toe and 100% waterproof construction, and you're in business. Aluminum alloy toe meets ASTM F2413 standards for protection. 100% waterproof / breathable membrane bootie. Moisture-wicking super-knit lining. Removable AirFlow open-cell PU orthotic insert is breathable from heel-to-toe, anti-bacterial, anti-fungal and machine-washable. Tempered steel shank for firm underfoot support. HEX oil, heat and slip-resistant lightweight rubber outsole.