Triple layer with full aluminum core from base to rim for superior heat distribution. Prevents scorching discoloration and corrosion at high temperatures. Three ring lid with built-in steam vent. Stay cool handles and helper handles. Oven safe up to 500F. Compatible on all cooktops. Hand wash recommended. Product contains PFAS for its nonstick properties. Includes: 8" Nonstick fry pan. 12" Nonstick fry pan. 12" Fry pan. 2qt Saucepan with lid. 4qt Saucepan with lid. 3.5qt Saucier pan with lid. 9qt Stockpot with colander insert and lid.