Pellon 911FF Featherweight Fabric Interfacing, White. 20" x 10 Yards by the Bolt. This fabric backing is suitable for a wide range of sewing projects. It's made of a soft and giving polyester with rayon blend and machine washable and dryable. This fusible interfacing fabric is ideal for use with light to midweight woven and knits such as challis, chambray, jersey, broadcloth and linen. It's not suitable for triacetate, lace, seersucker or rainwear. It's a single-sided fusible and safe for use on all types of sewing machines. Fiber Content: Acid-Free 100% Polyester