Denim used for blue jeans. It has a copper rivet to make the pocket stronger.

Denim is a very strong kind of cloth. Denim has been used in the United States since the late 18th century. The word comes from the name of a cloth called serge. Serge was first made in the French town of Nîmes (de Nîmes)), by the André family. First called serge de Nîmes, the name was soon shortened to denim.