Gabardine is a tough, tightly woven fabric used to make suits, overcoats, trousers and other garments. The fibre used to make the fabric is traditionally worsted wool, but may also be cotton, synthetic or mixed. The fabric is smooth on one side and has a diagonally ribbed surface on the other. Gabardine is a form of twill weave. Cotton gabardine is sometimes used by bespoke tailors to make pocket linings for office-type suits where the pocket's contents would quickly wear holes in the usual flimsy pocket lining material.