I, too, use Warm & Natural/white. I do not pre-shrink it as I like a 'crinkly' look to my quilts. I also like it as it's a natural fiber. Hence is typically is cooler in hot weather and warmer in cool weather. Generally any natural fibers will follow suit (wool, silk, cotton) versus the poly's. The W&N is generally also a fairly 'heavy' batting which, to me, makes a nice weight quilt.