For delicious biscuits and cookies this Circulon Ultimum insulated baking sheet is constructed from carbon steel and features the patented Ultra TOTAL non-stick utensil safe scratch resistant surface ensuring your cooking will not stick. The insulated air pocket not only ensures perfect heat distribution and but also even browning for the perfect crunch. Cleaning up is easy with this non-stick baking sheet as it is totally dishwasher safe. Complete with a lifetime guarantee this baking sheet should be an essential piece in your bakeware collection.