I have used Dream Orient and LOVE IT! no- you do not need to pre-wash it- I've been quilting since the mid '70's and have not yet ever considered pre-washing a batting- I do not know why anyone would go through that. warm & natural shrinks 3-5% (or so the package says) but really shrinkage is quite dependent on so many things- all of the materials used- how dense a quilt is quilted- how a quilt is laundered---all play in the outcome- if you don't want shrinkage wash it in cold water & dry it on fluff- or low heat. it is wonderful to work with and quilts up beautifully...the only batting I like more is Dream Wool (which does not shrink at all- is lightweight, lofty, breaths, cool in the summer and warm in the winter)