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 last, these baking sheets are made from natural, rustproof aluminium to ensure consistently even baked results for many years to come Even heating: Nordic Ware's half sheet baking pan has superior heat conductivity to ensure your baked goods come out evenly browned every time Prevents warping: With encapsulated galvanised steel rims, this cookie sheet prevents rusting. The included lid is perfect for transporting and storing baked goods Long warranty: We take pride in presenting the very finest products. We are confident in the quality of our sheet pans for baking, and so we supply them with a 5-year warranty