Pellon® SF101 Shape-Flex® is an all-purpose, 100% cotton, woven, fusible interfacing. It provides crisp support for collars, cuffs, yokes, pockets, facings, and other detail areas of a garment. It can also add body and permanent stability when used as a backing for needlework and punch embroidery. We use it to add body to the handles and pockets in a bag, plus we use it to back light-colored fabrics before appliqueing them so background fabrics don't show through (shadowing). 20" wide. Iron at wool/steam setting.