Heirloom Fusible is an iron on batting which is fusible on both sides. Our Fusible 80/20 is made the same way as our Premium 80/20, except we use a fusible resin in the spray bonding process. This resin eliminates the need for pinning or basting, saving quilters time and effort. Simply press your quilt from the center to the outer edges. Make sure you keep your iron moving, pressing approximately 3-4 seconds in each area. Once you have covered the entire surface area of your quilt, allow the quilt to cool. You may then begin quilting by hand or machine. Shrinkage of 3-5% and may be quilted up to 4" apart.