Fat Daddio's ProSeries Cookie Sheets feature a slim and heavy-duty design that ensures it will be the last cookie sheet you will ever need. The anodized aluminum surface will heat fast and cool quickly to prevent over-baking. Crafted with a 1 1/2" lip on one edge of the pan for easy-handling. Safe for citrus-based foods, temperature rated to 550° F (285° C), and freezer safe.