Stay safe wearing the Nautilus Safety Footwear Zephyr CT work safety shoes. Carbon nanofiber toe meets or exceeds ASTM 2413-18 Impact/Compression 75 lb and EH Standards for Safety Toe protective footwear. Fitted with a traditional lace-up closure, padded tongue and collar, and perforation up the side to keep air flowing. Round toe. Pull tab at heel. Textile upper, lining, and removable insole. Slip-resistant rubber outsole and forefront pads meets Mark II Oily Wet Slip Rating of .58. Synthetic outsole.