What About Muslin?
I had a really bad experience using inexpensive muslin. I used it in a quilt top that had around 150 4" squares. After the top was done, I got to thinking about the muslin. Where did I purchase it? What was the quality of it? So I took a large piece of the muslin and washed it in my washing machine as I would wash a completed quilt. Ye gods! It shrunk by about 20% and wrinkled so extensively that I couldn't even iron the wrinkles out. So I've been taking the quilt top apart and replacing the "bad" squares with better muslin. It is taking me forever. I should have known that you get what you paid for. Muslin isn't expensive, so it's only slightly more expensive to use higher quality muslin.