I use Hobbs 80/20 most of the time. Joann's replaced it with Farifield 80/20 which I used recently and didn't care for. Just picked up a few Hobbs 80/20 while in Lancaster PA - had to look twice as it's labeled Cotton with the 80/20 mentioned in smaller letters further down on the bag.
For baby and kid's quilts I like to use a good poly like Quilters Dream, it's flat and lightweight and no bearding.
May in Jersey