The Pellon 931TD Fabric Fusible Interfacing is a high-quality midweight interfacing that is perfect for a variety of sewing projects. This one-sided fusible interfacing is designed for use with medium to heavyweight fabrics, making it ideal for active sportswear, linings, pillows, curtains, and bags. It is made of acid-free 100% Polyester and is machine washable and dryable. With its versatile use and durable construction, this Pellon interfacing is a must-have for any sewing enthusiast.