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 I/75 and C/75 Standards TRACTION: Oil- and slip-resistant, non-marking, rubber outsoles are used for improved traction that meet or exceed ASTM F1677 MARK II and ASTM F2913 SATRA Non-Slip Testing Standards; Lug sole patterns provide grip even on slick surfaces WATERPROOF: KEEN. DRY 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 (EH)-rated to provide a secondary source of protection from live electrical circuits; A full-length TPU stability shank gives added support SAFETY & COMFORT: Reflective safety features run the entire length of the shoe for added visibility; Moisture-wicking textiles are used to keep feet dry and CLEANSPORT NXT provides natural odor protection using probiotics