Originally Posted by
capejohn
I tried a helmet for winter riding six or seven years ago but that didn't work out. I would suggest ditching the helmet and go with a wool cap if you can bring yourself to ride without a helmet. I can say that once you go hat, you will never go back to a helmet.
I already had a thin windproof fleece hat I wore under my regular bike helmet, as well as an even thinner balaclava for when the weather was not quite as cold. Warmth was a complete non-issue.
I say "was" because I ended up buying a Giro Encore 2 and have been using it for a week or so now. Overall opinion is positive; I'll write a more substantial commentary soon.