Let me add my 2-cents by saying that even though there are numerous, beautiful quilt backing fabrics out there....nothing has the feel that muslin has. I just love it, I love the softness, I love the way it ages and gets softer and softer. I love the way it breaths with you. It seems like magic to me because in the winter when you want to be warm it holds the warmth in and in the summer it breathes and lets the cool in. I like a medium weight muslin best of all.