Onguard SureFlex Grey/Orange PVC Knee Boots with Safety-Loc outsole and steel toe feature PVC/nitrile sole along with a PVC compound upper. The outsole prevents slipping and the steel shank PRO ides firm arch support. The 100% waterPRO f Boots resist chemicals, abrasion, animal fats, petroleum, oils, grease and the kick off lugs PRO ote easy removal. The comfort insoles can be removed and the boots are used in farming, food PRO essing, chemical plants.