Manufactured following over a century of experience and "savoir faire", the this line embodies the tradition of professionalism of the Mauviel cookware lines. M'tradition features Copper tin inside. Tinning is by traditional process and is a 1.2 to 2mm thickness. Polished outside. Bronze or cast-iron handle. Fixed by sturdy copper rivets. Wash with soap and hot water, dry immediately. Never scour the interior. Use the Copperbrill copper cleaner.