Insulated bakeware heats more evenly than traditional bakeware， pocket of air circulates heat. Wrap resistant to ensure a perfect bake every time from cookies and other desserts to sheet pan dinners. Hot air circulates between two layers to ensure even heating and no scorching， making it almost impossible to burn your cookies. Textured bottom surface heats up quicker while retaining moisture to prevent the top sheet from overheating. Made of durable carbon steel.