Twill

Twill is a fabric characterized by its diagonal weave; Gabardine, Cavalry, and Herringbone are three manifestations thereof. Twill is an extremely tight weave that can be mistaken for silk. Due to its diagonal texture twill is a bit softer than Broadcloth and will drape more easily. The most basic twill weave is two threads in one direction, crossed over by a single thread in the opposite direction.