When I'm riding, my ears often get cold, while the rest of my head is fine or too hot. Headbands are too hot. I cut the foot off of some polarfleece socks and then cut a 1 inch slit in the end of the toe. Then I slipped the the fleece onto the straps of my helmut. The straps hold them in place over my ears, but the rest of my head can stay cool. If the day warms up, they take very little space in my pocket.