This baking mat is made of fiberglass and food grade silicon. It has a non-stick surface that helps baked goods release easily. Plus this sheet is great for kneading dough and candies. It is eco-friendly with thousands of reuses, replacing parchment and wax paper. You can use this silicone baking sheet in temperatures ranging from -40F/-40C to 475F/250C and it is oven, microwave and freeze safe. After using simply clean with mild soap and warm water and store flat or rolled up. Available in many different sizes.