I found a spool of cotton hand quilting thread in my stash. Don't know where it came from but decided to use it when I went to hand sew the binding onto the back as it was the perfect color I needed. I really liked the thread as it didn't seem to tangle up as much. And yes it did seem thicker too. Normally I just use the thread I used to quilt it to empty the bobbin. Its usually cotton anyway and I get my bobbin back. I'll even use the leftover bobbin thread to stitch the binding onto the front side of the quilt to help empty it. But I did like how that cotton hand quilting thread played for me.