Pellon® 911FF 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. 90% Polyester/10% Rayon. 20in x 40yds Non-Woven Fusible Weight: Featherweight Single Sided Washing/Drying instructions: Machine wash warm. Tumble dry low or dry clean.