I love muslin as quilt backings. JoAnns carriers various widths. Muslin is just so good to have on hand to practice a quilting technique, to make up a dress/blouse pattern for fitting. Years and years ago I made "cottage" curtains with muslin for my house. Not long ago I made curtains (not drapes) for my DD and I used muslin for the linning. Those curtains had such a good "hand". Just as others mention here, wash it first.