Features of the KEEN Men's Pittsburgh Energy 6 Inch Waterproof Boot Left and right asymmetrical, non-metallic carbon-fiber toes offer unobtrusive Fit and Are 15% lighter than steel Keen. Dry waterproof, breathable membrane Oil and slip-resistant non-marking rubber Outsole Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear provides a secondary source of protection incase accidentally coming into contact with live electrical circuits Reflective webbing for additional safety and visibility Full-grain waterproof leather Keen.Regen: A lightweight, compression-resisting Midsole providing 50% more energy return than standard EVA foam Secure Fit lace capture system Removable metatomical PU Footbed Cleansport NXT Technology for natural odor protection Environmentally preferred premium leather from LWG-Certified Tannery PFC-Free, durable water repellent Locking metal lace hooks TPU shank for midfoot support