Pellon SF101 Fusible Interfacing 15"x2yd-White. SF101 Interfacing is a woven interfacing for light to midweight fabrics. It provides crisp support for collars, cuffs, yokes, pockets, facings and other detail areas of a garment. It adds body and permanent stability when used as a backing for needlework and punch emboridery. It can also be used to stablize t-shirt quilts. Shape-Flex has both lengthwise and crosswise grain for stability in both directions.