Wool batting keeps you warm and dry. Cottom sweats and hold moisture, then when a cool breeze comes thru you can get cold. Baby quilts are best done with wool, they stay warm but never sweat because it breaths. My grandson has 5 quilts and now is begging for more with wool inside. He is seven and states there is a huge difference in warmth. They do tend to sweat and he doesn't with that particular quilt.