I've been cycling to and from work as the temperature has been dropping. It's been one or two degrees above freezing (discounting windchill) at commute times for the past couple of days, and I expect it to drop further as the winter progresses.
I don't really have any sort of winter-specific headwear. I've actually been using my Headsweats CoolMax Shorty skullcap, which actually does a pretty darn good job of keeping my otherwise overly-vented head at a comfortable, if not a little cool, temperature. There are two issues, though. First, I know that it won't be enough to keep me in the comfort zone when the temperature drops another, say, 10 degrees. Second, even at the current temperatures, my ears are uncomfortably cold.
Does anyone have any recommendations for head and/or ear warmth, given my above description? I'd like to have one piece of apparel instead of separate ones for ear and head. Face and neck need not be a consideration. Also, given that I'm comfortable at freezing with what's one of the lightest materials there is, I really don't think that I'd need anything that insulative to get down into the 20s or teens, which is good, as I'd like to have an under-helmet solution. My guess is that windstopping power is more important than insulation.
Any help would be appreciated.