Turn any pan into a non-stick surface and save time cleaning up. 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. Mat measures 11-5/8 inch x 16-1/2”, made for a 13 inch x 18 inch pan. Freezer, microwave, and oven-safe, can be used at temperatures varying from -40 degrees c to 250 degrees c (-40 degrees f to 500 degrees f)