Mauviel, a French family business established in 1830 and located in the Normandy town of Villedieu-les-Poeles, is the foremost manufacturer of professional copper cookware in the world today. Highly regarded in the professional world, with over 170 years of experience, Mauviel offers several different lines of copper cookware to professional chefs and home cooks that appreciate the benefits of their high quality products. Professional cooks can attest that copper cookware is an essential part of every cookware collection as it is 2X more conductive than aluminum and 10X more conductive than stainless steel. This advantage makes copper the very best material for cooking, as it is unsurpassed in its ability to heat up evenly and rapidly and to cool down quickly, allowing for maximum control and great cooking results. M'heritage, a professional line that has a thicker gauge of copper for added strength, combines two efficient materials, a very thick 2.5 mm copper exterior, and very thin layer of stainless steel on the interior. The copper exterior makes up 90% of the sandwiched material and provides for perfect conductivity. The stainless steel lining is easy to clean and very durable. M'heritage products have straight sides and have handles that are cast-iron and attached to the bodies with sturdy stainless steel rivets.