Meyer Infinite Circulon features the Total® hard anodized food release system. This combines a unique "hi-low" (raised circles & grooves) base & a state of the art non-stick formula. The hi-low interior groove system gives a high resistance to abrasion & requires little or no oil, allowing you to cook more healthily This roaster & rack is made from carbon steel & both the roaster & the rack itself are nonstick-coated for easier cleaning. The rack also has a convex shape which cradles the meat & helps to keep it stable