you mentioned this is from polar fleece pants--I used a polar fleece jacket in a memory quilt for my mother-in-law. It sewed fine, but I have to say that the fleece was a terror to quilt on my LA--I think the reason that polar fleece is so dang warm and not true with fleece-fleece is that there is a poly-spun core in the polar fleece. I had to slow Wayyy down .