This mats carpeted surface is made from PET plastic bottles, and the all-rubber backing is made from used tires. Bi-level construction traps dirt and moisture below the surface so your interior spaces stay clean and dry. The durable rubber backing is slip-resistant to keep mat in position. Easy-to-clean—just sweep, shake out or vacuum. Recommended for hard surface floors and low-pile carpet entryways, hallways and lobbies. Indoor/Outdoor: Indoor/Outdoor; Compatible Surface: Hard Floors; Pavement; Mat Shape: Rectangular; Mat Surface: Carpeted.