I was wanting to topstitch on my son's plaid flannel quilt but the thread that I wanted to use....a brown....was a poly blend. My machine loves cotton thread...the stitches are much nicer looking. The poly thread...the brown color...just sat on top of the fabric and didn't make a pretty stitch at all. Since I didn't have an all cotton brown thread, I am hand stitching with it instead...no stores selling cotton thread in my small town....go figure. This is something that I am wanting to finish now because it has been a UFO for a while. Ready to move on to something else so I am using what I have....