I have only used the Hobbs 80/20 fusible batt. It is much like any other 80/20 batt when washed after the quilt is finished. The Hobbs Polydown is a higher loft than the 80/20 from what I've seen with Charisma's quilts that she used it in. I want to try the Hobbs Polydown with 505 bating spray the next time I machine quilt on my domestic machine.