I use Aurifil monofilament thread on almost every quilt I do FMQ on. I have a Bernina Artista 200 and have never had any trouble. I use cotton Aurifil in the bobbin in a color that matches my backing. When I get better at FMQ, I may give up my monofilament thread; but, for now, it works great for me. I think Aurifil's monofilament is made from nylon.