I use a lot of fleece for the back of quilts we send to the military. I do not wash and have never had one shrink. We can not do rag quilts so I use my foot the trims the seam as it sews it. you get a flat well done seam. Wish I could think of the name of the foot. It finishes the seam just like a sserger would.
They make really nice warm and cuddly quilts.
Linda