Durable twill -woven fabric with coloured (usually blue) warp (lengthwise) and white filling (crosswise) threads, also sometimes woven in coloured stripes.
The name originated in the French serge de Nîmes . Denim is usually all- cotton , though it is sometimes made of a cotton-synthetic mixture. Decades of use in the clothing industry, especially in the manufacture of overalls and trousers worn for heavy labour, have demonstrated denim's durability, a quality that, along with its comfort, made denim jeans extremely popular for leisure wear in the late 20th century.