How do Calphalon commercial roasters ensure superb results™ They're made of heavy-gauge aluminum, the ideal material for consistent heat conduction. They feature low sides, so air circulates freely around your roast and moisture evaporates quickly. They stay level, even after years of high heat exposure, and they're accompanied by our U-shaped nonstick roasting rack, turkey lifters, and injection baster! If you've never tried slow-roasted foods, now's the time to take the time.