This attractive, heavy-duty polypropylene doormat has a waterproof backing and channeled edge that acts as a dam — keeping moisture, mud, and grit within bounds. The raised design scrapes shoes clean, while grippers on bottom keep prevent the mat from slipping and shifting. Just vacuum clean when dry, or hose off and air dry for deeper cleaning. Made of tough P.E.T. material that holds up to 1-1/2 gallons of liquid per square yard, yet dries quickly and won't fade or rot.