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