The Pellon Heavyweight Fabric Interfacing is a high-quality sew-in interfacing designed for extra heavyweight fabric projects. This interfacing is perfect for a wide range of crafts, including home decor, fabric bowls, fabric books, hats, and more. It is made of a non-woven material and has a white color. The interfacing measures 20" x 30 yards and is acid-free. With a fiber content of 70% polyester and 30% rayon, it provides excellent stability and support for your fabric projects.