The GoWISE USA Non-Stick Reusable Durable Baking and Grilling Mats are Cook MESS FREE. Each side is reusable. Not only can you use the grill mats on a grill, you also can use it in a microwave, oven, or freezer. They are easy to clean and are dishwasher safe, and is made with a non-stick surface that eliminates both fats and the hassle of cleaning your grill. The mats can withstand a wide temperature range from -95 degrees Fahrenheit to 500 degrees Fahrenheit. The non-stick surface is made of PTFE Coated fiberglass fabric that are FDA & SGS approved.