I used to be a distance runner .. while menopausal. I learned early of cotton. It sticks and stays wet. Tech poly kept me dry, breathed thru most hot flashes, was warmer than cotton. But the best fabric I discovered was smart wool. Perfect with my hot flashes. It’s cool or warm when need be; it breathes; it stays dry. So, my next quilt will have wool batting. I’m going to try it. I’m tired of thinking my quilt is too warm or too cold.