Designed for indoor and outdoor use Castellated carpet surface provides scraping action, removing dirt from shoes and trapping dirt and moisture. Rubber-cleated backing provides stability and durability. Rubber borders strengthen and enhance safety. Recommended for both hard surfaces and carpeted floors. Genuine Joe Waterguard Mat, 4ft. x 6ft., Charcoal is one of many Entrance Mats available through Office Depot. Made by Genuine Joe.