These SureFlex grey, men's size 9 work boots are made of PVC. They are waterproof, high chemical/abrasive/slip-resistant, and meet the ASTM standard. The non-CSA boots have a 16-inch height, nitrile sole, steel toes, steel shank, orange Safety-Loc outsole, replaceable insole, and kick-off lugs. They are suitable for use in farming.