Thank you, Brynn! Now I know. Yes, I treated the batting like I treat my fabrics - throw it in the washer on hot cycle. Big mistake. But I do think the package should have some sort of instructions for beginners.
I really want to try cotton batting. The Pellon Nature's Touch is made in the USA so I really wanted to use it. Price seemed good and the "scrim binder" seems to be a good idea. Also, I really loved the texture - so pleasant compared to the synthetic. Maybe I'll see if Jo-Ann's will give me a new bag in exchange....
So the shrinkage is not a problem? I am a hand quilter, by the way.