Solid Stainless Steel body with vented glass lids and cast steel riveted handles. Encapsulated base with a tuxCORE aluminum disc ensures even and quick heating. Organic ceramic-coated nonstick frypan is PTFE & PFOA free. Stainless steel vessels and nonstick ceramic coating are oven safe up to 500Â°F. Tempered glass lids are oven safe up to 350Â°F.