SuperScrape mats feature a molded tread pattern that effectively scrapes tough dirt and grime from shoes. It is ideal for use outside as a scraper mat or as a slip-resistant mat in wet areas. The SuperScrape mat is grease/oil proof, chemical resistant, and certified slip-resistant by the National Floor Safety Institute NFSI. Its lightweight flexible design makes it easy to clean shake off soil and hose off. It can also be commercially laundered or autoclave sterilized.CLEAN Surface cleats effectively remove and trap dirt and sand below shoe level to prevent trackingSAFE Slip-resistant even in wet environments; certified high-traction by the National Floor Safety Institute NFSIEASY TO CLEAN Lightweight flexible design ensures easy handling and cleaning shake off soil and hose off; can be commercially laundered or autoclave sterilizedGrease/oil proof; chemical resistant. Please note, mat sizes are approximate as rubber shrinks and expands in conjunction with temperature and time. Tolerable manufacturing size variance is 3-5%.