khoun, don't you have problems fogging your glasses on climbs with that headsock? I've found that I always need to pull my balaclava down to at least uncover my nose and usually my mouth too to avoid serious fogging issues while riding slow and hard. I use a Helly Hansen polypropylene balaclava that I bought at a ski shop for all my 25F and below riding. It's thin enough to comfortably go under my helmet and has kept my head warm down into single digit temps (I'm also a very warm person in general though).