Ritz Silicone Canning Mat 11.625in x 16.5in made of food-grade silicone. Promotes even heat distribution. Safe up to 465 degrees Fahrenheit. Promotes even heat distribution. Non-stock and non-skid. Dishwasher, Microwave and Freezer-safe. Will not absorb flavors or odors. Wipes clean. Reversible use both sides. Protect countertops and all surfaces from heat and mess. Quick and easy cleanup. Rolls up for easy storage.