Carpet covered, rubber reinforced nibs scrape debris and pull moisture away from shoes. Dirt and water are trapped by rubber reinforced polypropylene carpet ridges. 100% rubber backing for maximum durability. Recommended as an indoor mat, but substitutes as an outdoor mat in warm to moderate climates. Simple to clean, just vacuum or hose off. Not recommended for use in areas exposed to grease or petroleum products. Passes flammability standards DOCFFI-70.