Pellon® 805 Wonder-Under® 17" x 10 yards Bolt. Color: White. Fiber Content: 100% Polyester. Application Method: Fusible. Wonder-Under® is the original paper-backed fusible web. It fuses easily in mere seconds and is 100% machine stitchable. The fabric will maintain a soft hand after fusing. Wonder-Under® is great for apparel, home décor, and craft projects. It bonds fabric to fabric or any porous surface like wood and cardboard.