This cookware set has a clean and simple design and is easy to use. Stainless steel and the wide bottom make it heat up fast – and the temperature is easier to regulate based on what kind of food you’re cooking., stainless steel. This cookware set has a clean and simple design and is easy to use. Stainless steel and the wide bottom make it heat up fast – and the temperature is easier to regulate based on what kind of food you’re cooking. Stainless steel.