Super durable, lighter than cast iron and oh, that gorgeous unexpected blue. Perfect for toasting nuts, reheating leftovers and baking a couple of cookies, our slate blue eighth sheet pans are 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 pans heat quickly and maintain consistent temperatures for perfectly browned and crisped foods. The reinforced rims prevent warping, and a double layer of silicone-based nonstick coating ensures easy release and quick cleanup.