A textured finish with integral folds and ridges; this might be achieved with finishes to be permanent or semi permanent , such a pleating or other folding or scrunching techniques on a plain cloth or some sort of ripple or pocketed design woven in.
When the crimped surface is an integral part of the weave, two layers are needed to create the effect – the loosely woven top layer is pulled back into a tighter one behind.
Crimped textiles are often washable but sensitive to ironing.