No one material is ideal for all cooking needs. That's why Lagostina Collezione Pro uses a variety of materials in the cookware. Stainless steel tri-ply offers true even heat distribution. Bi-clad features a stainless interior with an anodized exterior for even heat distribution. Copper tri-ply pieces react more quickly to changes in heat for precise cooking control. Enamelled cast iron offers superior heat retention. This collection of pieces offers the best of all worlds for unparalleled versatility in the kitchen.