Mongrel 561020 L/U Zip Nitrile Scuff Cap Safety BootThe 561 incorporates the highest quality materials, providing the wearer the ultimate in comfort and protection for when a heavy duty boot is a necessity. The industry leading Vibram XS Work outsole is heat, oil & acid resistant, and the SRC slip resistance ensures excellent grip & traction in the most testing of underfoot conditions. A YKK zipper allows for easy on off, and is protected by a full length leather ZipGuard. Safety and comfort features