Material: Superior, rust-proof, food-grade Tri-Ply Stainless Steel. It comes with a glass lid Hawkins Tri-Ply Stainless Steel Cookware retains the advantages of cooking on stainless steel surfaces while eliminating the disadvantages of sticking and burning that come with normal stainless steel Hawkins Tri-Ply Stainless Steel Cookware is made of three layers The Cooking Surface is made of AISI 304, 18/8 food grade stainless steel that is extremely hygienic, durable and non-reactive to most foods. It does not pit or corrode The Core is made of heavy gauge aluminium which spreads heat evenly and prevents hot spots