The 3M Nomad Terra Entrance Matting 9100 is a heavy-duty vinyl scraper mat designed for high-traffic areas, both indoors and outdoors. It features an unbacked design that allows dirt and moisture to pass through and be trapped in the mat well, and its solid vinyl construction withstands trolley and heavy foot traffic. The mat also has a high-tech coating for added durability Material: It's made of durable vinyl in an open, continuously patterned surface with a Z-web design. Design: The Z-web construction creates scraping edges that effectively remove dirt, debris, and moisture from shoes.