It is the fabric used to make jeans, a garment in which the identification between shape and material is complete. It is usually pure cotton, in a diagonal weave in which the warp yarns are dyed indigo, which is a blue dye of vegetable origin. The name denim comes from the French city of NÑmes. Thanks to its sturdiness, endurance, washability and easy maintenance, it has always been associated with work clothes. The changes in clothing and consumption in the 20th century have made it the casual fabric par excellence, used especially for pants but also for jackets, dresses, skirts, and accessories. The mass production of jeans, starting in the 1970s, made it the favorite uniform of young people. The indigo color has remained number one over the years, but denim can also be natural, black, brightly-colored, pre-washed, bleached, stonewashed, printed, and embroidered, as well as made in stretch fabric. From the pop styles of the hippies to the branded denim of designers, from the most basic styles to the high-tech versions of the new millennium, the use of this fabric has no limits. Present in the Collection of almost every designer, as the motif of a season or as an independent line, denim has known the glory of the haute couture runways thanks to the daring interpretations and sumptuous transformations created by Chanel, Gaultier, Galliano, and Lacroix.