The 3 Piece Cookie Baking Set is a cookie baker's dream combo. A Naturals Half Sheet, a woven fabric Deluxe Silicone nonstick mat and a nonstick coated metal Large Cooking Rack. All sized to fit together. Made of Formed Aluminum . The Set is BPA & Melamine-Free. The Half Sheet Pan and Non Stick Mat are oven safe up to 400 degrees. ALUMINUM