American made: All Nordic Ware baking accessories are proudly made in the USA to exacting standards, with careful attention to detail in the manufacturing process Natural aluminium: Built to stand the test of time, this cake tin is designed to create delicious, perfectly browned home-made treats for many years to come Better airflow: This half sheet baking pan features an exclusive Prism grid for added durability, easy release, and better airflow for more uniform crisping Prevents warping: With encapsulated galvanised steel rims, this cookie sheet prevents rusting and is designed to look fantastic in your kitchen for years Lifetime warranty: We take pride in presenting the very finest products. We are confident in the quality of our aluminium bakeware, and so we supply it with a lifetime warranty