Keen Utility Men's 6" Pittsburgh Engery Work BootFeatures Left and right asymmetrical, non metallic carbon fiber toes offer unobtrusive fit and are 15% lighter than steel KEEN. DRY waterproof, breathable membrane Reflective webbing for additional safety and visibility Secure fit lace capture system TPU shank for midfoot support 90 heel (5 8 Height) provides stability and helps catch or lock the foot in place Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear provides a secondary