Double Sided Refractory: The fireplace mat is made of 3 layers of high quality silicone coated fiberglass. Both sides of the flame retardant mat are covered with a flame retardant silicone coating that withstands high temperatures of 1800F that withstands different temperatures on the deck and terrace. Extra large size: the fireplace mat has a size of 39'*47', which is large enough to protect the area under the fireplace or hearth and even the surroundings from flying embers, flickering embers or sparks. And as a barbecue mat, it can completely protect your deck, patio, lawn and other outdoor surfaces from oil and grease stains or food stains. Durable fiberglass material: the mat chimney is fiberglass. It has strong resistance to heat and corrosion. The protective mat will not burn or melt or mold. Compared with traditional mats, our heat resistant mat has finely stitched edges. It won't stick, crack, wrinkle around the edges or crack in the heat. Easy to clean and store: the grill mat has a waterproof design, just rinse it with soap and water or a garden hose. The reusable mat can be reused after washing and drying. And the barbecue mat can be folded for easy storage. The storage bag comes with the patio protection mat. Multi-function mat: The outdoor portable barbecue mat can be used in a variety of scenarios to prevent outdoor camping fires air, house fires, barbecues, fireplaces, fireplaces, garage floors, etc. A creative gift for family and friends.