The Mineral B Element Iron 3-fold frying pans by De Buyer are made of 99% iron and are environmentally friendly as they are reusable. Free from PFOA and PTFE, the pans are coated with organic beeswax, which provides natural protection against oxidation while also enhancing non-stick properties. The usual process of seasoning iron pans is not required for these pans. Simply spread some oil in the pan and heat it to the smoke point, and that's all you need to do.