Pellon 910 Sew-In Featherweight is a lightweight, nonwoven interfacing for light to medium-weight fabrics. It is ideal for use with fabrics such as challis, chambray, jersey, broadcloth, and linen and excellent for blouses, dresses, and lightweight jackets. 100% Polyester Non-Woven Sew-In Weight: Featherweight Single Sided Washing/Drying instructions: Machine wash warm. Tumble dry low or dry clean.