Super durable, lighter than cast iron and oh, that gorgeous unexpected slate blue. Perfect for batches of cookies and one-pan meals, our set of slate blue sheet pans is part of our exclusive bakeware collection that takes its cue from professional kitchens. Made of carbon steel—an alloy of 99% iron and 1% carbon that's nearly indestructible—the two baking sheets heat quickly and maintain consistent temperatures for perfectly browned and crisped foods. A double layer of silicone-based nonstick coating ensures easy release and quick cleanup.