Pellon SF101 Fabric Interfacing White 20 x 15 Yards by the Bolt - 1 Pack. Enjoy the many creative possibilities with Pellon Shape flex. It is an all-purpose woven fusible interfacing that provides crisp support for several locations on a garment. Use Pellon sf101 for collars cuffs yokes pockets facings and other detail areas. It makes these areas more stable and works nicely for making T-shirt quilts. This Pellon cotton comes in a 15-yd bolt and it retains its shape very well. It is intended for light- and medium-density fabrics and is machine washable for easy care.