Features Left and right asymmetrical, non-metallic carbon-fiber toes offer unobtrusive fit and are 15% lighter than steel KEEN.DRY waterproof, breathable membrane Electrical hazard (EH) rated - providing a secondary source of protection in case of accidental contact with live electrical circuits 100% non-metallic construction for easily passing through metal detectors in highly-secured areas Reflective webbing for additional safety and visibility Nylon shank for midfoot support Secure fit lace capture system Locking non-metallic lace hooks