The housing of all pans Kosta are made of forged aluminum: heats evenly and no deformation. Reinforced 5-layer non-stick coating POLYGO MAXXI with minerals, metal utensils safe. Coating does not contain PFOA, cadmium, and lead and is completely safe. Permitted to use non-sharp metal utensils. Suitable for all types of cookers, including induction. Comfortable stay-cool stainless steel handle with silicone coating. Guarantee on Kosta series cookware is 5 years.