Wonderful for under your showdogs exercise pens to help keep them clean. Plastic Mats are made of 100% virgin polypropylene. Hollow polypropylene tubes are woven together to form an attractive and durable mat. Cleaning is easy with just some water or a few sweeps from a broom.Pick them up and there're instantly dry! Mildew is never a problem because the woven construction allows the water to drain. Each mat is light and can be folded into a very compact size for easy storage. Also excellent for RV's to help keep the dirt from being tracked in your rigs!