I know this is a general question, but I am posting it here because this is the only forum I look at. So if it's 20 degrees out, what do you do? If I was walking around I might wear a warm hat or something, but I don't think that will fit under the helmet. (??)

-Jason

P.S. Sorry for posting multiple helmet related questions but I am bored and don't really have anything to say about fixed gear riding or bikes right now.