There is also a product called appliqué fibers that you can leave in. You can machine appliqué it on if you glue the fiber clear to the edge. I used it in needle turn appliqué . I just cut the fabric larger than the fiber product to create a seam allowance. You glue the fabric to it with water based glue. Then when finished with the block hand wash in synthrapol. It leaves just a little fiber behind to give dimension to appliqué but no stiffness.