PyroProtecto-Fireproof-Grill Mat for Gas or Charcoal Grills, protects any flooring, 30x40, Gray fireproof fabric, made from fiberglass with a fiberlock Silicone coating protects from sparks, grease or ember (2,000 degrees F melting temperature) Not porous, so it will be very clean after using just soap and water Super thin, so no aggrevation when standing on it After use, can be rolled up and put back in the tube it was delivered in