STEEL TOE Left and right asymmetrical uniquely anatomically correct steel toe design provides a roomier toe box for maximum comfort and unobtrusive fit The Pittsburgh 6 meets or exceeds ASTM F2412 and F2413 I75 and C75 Standards TRACTION Oil and slipresistant nonmarking rubber outsoles are used for improved traction that meet or exceed ASTM F1677 MARK II and ASTM F2913 SATRA NonSlip Testing Standards Lug sole patterns provide grip even on slick surfaces WATERPROOF KEENDRY is a waterproof breathable membrane liner that lets vapor out without letting water in for keeping your feet dry and comfortable The Pittsburgh 6 boot does have a mesh liner that integrates with the waterproof membrane UNDER FOOT PROTECTION Electrical Hazard EHrated to provide a secondary source of protection from live electrical circuits A fulllength TPU stability shank gives added support SAFETY COMFORT Reflective safety features run the entire length of the shoe for added visibility Moisturewicking textiles are used to keep feet dry