Does your oven have hot spots that make it difficult to bake? Or perhaps you just want perfection every time. This is the cookie sheet for you.This 13-inch by 16-inch baking sheet has a cushion of air between two layers of aluminium. The insulation protects against over-browned cookie bottoms and overdone pizza crusts, especially in ovens with hot spots. Get perfectly baked results every time you bake with this natural aluminium pan. Proudly made in the USA.