i might have put some stupid advice about using t-shirt sleeves as face masks earlier...
i retract my previous statement... t-shirt sleeves freeze up too fast. They don't protect your face from the wind at all. You just end up with a nice thick layer of ice on the sleeve..
don't stinge and just get one of those moisture wicking bellaclavas (spelling?)
it'll be well worth it, those thigns won't freeze on you and you'll stay nice and toasty