Use a water soluble on the top so the stitches are not buried. If the design is "dense" you need to use a cutaway on the bottom so it will support the dense design through washing etc. Also, I never hoop the towels, only hoop the stablizer(either one that is adhesive or use 505 on the cutaway). Also, wash the towel before embroidering it so that it wont shrink/distort when washed later.