I have been quilting since 1988 and used poly in a couple of my quilts and didn't like the bearding at all. Once I started machine quilting, I found that I liked cotton batting or hobbs Heirloom 80/20 batting; poly batting slips. when you're machine quilting, cotton sticks to your fabrics.
My hubby sweats far too much under a quilt with poly
batting in it.
Sharon W.