I also like muslin and use it for piecing and backing. Presently I'm using Moda's Bella muslin as the background fabric in a quilt for my granddaughter, love the color and the 'hand' of the fabric. It was on sale too, 120" wide at less than $8 per yard. A 1 yard cut of it equals 3 yards regular width fabric so you know I'm buying more when I can. I've used some lesser quality muslin for foundation piecing of string quilts. I try to pre wash and dry all my fabrics just so there are no surprises when the quilt is washed. May in Jersery