Fusible Featherweight Apparel Interfacing by Pellon is made of 90% polyester and 10% rayon. This interfacing features a little stretch and is designed to be used on lightweight fabrics like jersey, broadcloth, challis, chambray, and linen. The Pellon Fusible Lightweight Interfacing is not made to be used with triacetate, lace, seersucker, or rainwear. This item is sold by the yard.