Denim is a sturdy fabric made from a rugged tight woven twill, in which the weft passes under two or more warp threads.
While the warp is made from indigo dyed yarns, the weft uses cotton in its natural color.
The main characteristic and most recognizable thing about denim is its capability to fade up to white, its core color. This is due to the superficial dye of the indigo dyestuff.
The fabric originated in Nimes, France (“serge de Nimes”), during the 19th century, and after having been used on jeanswear and workwear garments for decades, denim gained popularity with youngsters in the 1950’s as a symbol of rebellion.