It is the basic structure of double-sided circular woven fabric, which consists of the longitudinal direction of the front coil and the longitudinal direction of the rear coil in a certain proportion. Common ones are 1+ 1 rib (flat rib), 2+2 rib and spandex rib.

Double rib cloth: a common double-sided cloth, also called cotton wool cloth, consists of two ribs, such as cotton wool cloth, stretched cotton wool cloth, spandex cotton wool cloth and so on.