Someone on this board turned me on to Superior invisible thread when I asked about it. I have used nylon in the past and hated it. The Superior sews just like other polyester threads EXCEPT you have to loosen your top tension way down so you don't get loopies on the back of your quilt. I don't know how to adjust the tension if you use the Superior polyester in top and bobbin. Experiment with fabric scraps and left over batting.