I was told that the selvages didn't shrink, and your dress or whatever you made would not fit correctly. I've found out that with quilting the selvages don't give, and some long armers don't like the selvages left on if you seam the backing. Who knows what is correct anymore. When you sewed dresses or shirts you used a5/8" seam, now when making a quilt its only 1/4" seam. LOL