Embossed Natural Aluminum Bakeware enhances the look and performance of our hugely popular baking pans. Exclusive Prism grid adds durability and provides easy release while also improving air flow for uniform crisping. Encapsulated galvanized steel rims prevent warping. this Prism Half Sheet set comes with a custom nesting oven-safe nonstick grid to crisp foods or use the sheet to bake and grid to cool and glaze.