Pellon's Shape Flex Woven Cotton Interfacing is an all-purpose fusible interfacing that provides support to collars, cuffs, pockets, and other areas. Shape Flex Interfacing can also be used to add body and permanent stability when used as backing for needlework and punch embroidery. This interfacing is intended for use with light to medium fabrics such as knits, oxford cloth, chambray, gingham, poly-cotton blends, and more. Before using you may want pre-shrink the interfacing by soaking it in warm water for about ten minutes. When finished gently squeeze out excess water and allow to air dry. Do not put in the washer or dry when pre-shrinking as it may lose its adhesive. Pellon's Shape Flex Woven Cotton Interfacing is made using 100% cotton and measures 20" wide.