These large freeze dryer silicone mats provide a practical and easy clean-up solution after each freeze drying cycle. Their dishwashable design ensures that sticky foods won't create a mess in your freeze dryer, while also adding a touch of cool to your freeze drying process. These food-grade freeze dryer mats can also be used for any 13" x 18" half-sheet baking tray. They are very durable, being heat-resistant withstanding temperatures up to 400° F. A must-have for all freeze drying applications!