This eco-friendly and easy-to-clean baking pan is manufactured from a mix of steel (for strength and durability), and aluminum (for superior conductivity). Made exclusively for us by USA Pans, the gold standard in professional bakeware. This line of heavy-duty pans bearing the King Arthur name is unsurpassed in quality, durability and innovative design. Pan is coated with Americoat, a clear, nonstick, non-toxic, environmentally friendly coating that is specially formulated for superior baking and an easy release of baked goods. Our customers, and our test kitchen bakers, swear by these baking sheets; try them yourself and see the difference they can make in your favorite recipes.