The mat surface is made from 100% different quality poly propylene and rubber backing is made from a compound of natural and recycled rubber. Unique ridged construction effectively removes and traps dirt and moisture below shoe level. Exclusive rubber-reinforced face nubs prevent piles from maintaining high performance and extending product life. Indoor / Outdoor: This conventional different type polypropylene face is suitable for indoor or outdoor use. Mats can easily be vacuumed or hosed off. Floor Gardens’ highly durable attractive fashion borders make it the perfect choice for indoor or outdoor applications. Our strong stud backing stays in the mat and off your floor–minimizing slip hazards and floor damage around the perimeter of the mat.