Bosal In R Form Foam Stabilizers are a unique foam stabilizer batting, laminated onto foam, ideal for bag making. It's soft, formable, easy-to-stitch, and needle friendly. This product gives stability and shape to your bags so they'll stand up instead of slouching down over time. Plus Fusible Double Side 54"x 58" Happy Hauler- Brushed polyester and napped tricot laminated to foam with a fusible surface on both sides. Measures approximately 54"x 58". Use with ATP640 Auntie's Two Happy Hauler Pattern, sold separately.