Oliver 16" PVC Puncture-Resistant Steel Toe Men's Gumboots with Metatarsal Guard, Green (22205) 100% Waterproof work boots feature injection molded, seamless PVC construction; wide profile NATUREform toe cap for more room; latex cushion liner prevents toes from touching cap Odor-reducing NANOlite Footbed massages your feet to promote greater blood flow and help fight off fatigue PVC/Nitrile compound outsole with extra deep tread is heat-resistant up to 266 F (130 C) and resistant to solvents, mild acids, alkalis, oils and fats Electrical hazard rated outsole, METprotect internal metatarsal impact protection, Steelflex steel midsole for penetration protection, NATUREform steel toe impact protection Meets ASTM F2413-11 M I/75 C/75 Mt/75 PR EH; recommended use: heavy metal, manufacturing