Made of fiberglass mesh and the highest quality food-grade silicone, which provides consistent heat distribution and promotes even baking Silpat is the original non-stick baking mat and has stood the test of time with use by the most demanding chefs in the world Freezer, microwave, and oven-safe can be used at temperatures varying from -40 degrees F to 428 degrees F The non-stick coating allows cookies to be baked evenly and slide off the pan without using oils, butter, or parchment paper.