T-fal E83452 Pre-Seasoned Cast Iron Dutch Oven Cookware, 6-Quart, Black Excellent heat retention; Keeps food warm at the table Heats evenly and consistently; Oven-safe up to 600 degree F and is PFOA Free and Cadmium Free Comes pre-seasoned for first use and includes step by step instructions for seasoning case Cast iron is the best material for heat retention and distribution and it can take some heat-up to 600 degrees F Limited Lifetime warranty and hand wash is recommended