Hard Anodized surface is harder than stainless steel, it's dense and will NOT chip;Premium Grade Nonstick coating deliver exceptional performance, durable and very easy to clean;Heavy gauge Aluminum core distribute heat evenly without any Hot spot;Hard Anodize cookware is oven safe to 450F, Glass lid is not designed for Oven use;Hand wash is recommend, clean is so easy, just wipe with towel, no detergent or any chemical needed