Pellon 910 Sew-In Featherweight Interfacing 20″ x 10 yards Bolt. Color: White. Fiber Content: 100% Polyester. Application Method: Sew-In. 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.