Christmas Sales! LOHAS Home Glass Fiber Nonstick Silicone Baking Cake Pastry Mat, Non-stick Baking Sheet, Countertop Work Station, 11.815.7 Inch Made of fiberglass and FDA and LFGB approved silicone,provides outstanding heat conductivity. The baking mats can withstand temperatures from -40 degrees Fahrenheit to 480 degrees Fahrenheit. Durable and long lasting performance, thousands of uses, depending on use and care. Flavors or odors will not penetrate the baking mats, can be used in oven, microwave and freezer. Flexible silicone baking mat provides nonstick surface without grease. Easy to clean, just wash off with soap and water, rinse, shake off water and let air dry. Dishwasher approved for top rack only. When not in use, it can be rolled up for easy storage.