Pellon® 911FF Fusible Featherweight Interfacing 20" x 10 yards Bolt. Color: Black. Fiber Content: 100% Polyester. Application Method: Fusible. Fusible Featherweight is a fusible, non-woven interfacing for light to mid-weight fabrics. It is best for use with wovens and knits such as challis, chambray, jersey, broadcloth, and linen. Fusing is not recommended for triacetate, lace, seersucker, or rainwear.