Rugged conditions call for footwear as durable and comfortable as Carhartts 6-Inch bal work boot/safety toe. From its oil-, chemical- and slip-resistant Vibram rubber outsole to its oil-tanned leather upper with waterproof membrane, this is one rugged boot. Comfort is enhanced with an OrthoLite insole, padded collar and OrthoLite Comfort Tongue, and performance is improved with a molded TPU (thermoplastic polyurethane) heel counter with an achilles flex joint. Built with a composite safety toe, it is ASTM 2413-05, EH rated.