Serge most often refers to worsted suiting fabric usually dyed navy blue. It can also be made of wool blends, including cotton, rayon, silk or manufactured fibers in various weights. It is a 2/2 right-hand twill, and the back shows the same twill line only in reverse.
The name is derived from the Latin serica, meaning silk, and later from the Italian sergea, a wool with silk blend.
Uses: suits, coats, dresses