crepe

A lightweight fabric of silk, rayon, cotton, wool, man-made, or blended fibers, and characterized by a crinkled surface. This surface is obtained through the use of crepe yarns (yarns that have such a high twist that the yarn kinks), and by chemical treatment with caustic soda, embossing, or weaving (usually with thicker warp yarns and thinner filling yarns). Although crepe is traditionally woven, crepe yarns are now used to produce knit crepes.