Siliconezone products were developed based on what professional and commercial chefs used: high-temperature silicone bakeware. Siliconezone bakeware can be exposed to temperatures up to 428° F and to temps down to -58° F, going essentially from your oven to your freezer. Products are covered in a high-gloss finish, making this bakeware non-porous to food flavors and odors. For the best baking experience, even heat distribution and quick cooling, Siliconezone is there. Nonstick surface. Made in the USA.