Join Date: Dec 2013
Location: Copenhagen, Denmark
Bikes: Bullitt Milk Plus with Alfine 11s; Dahon Smooth Hound
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Originally Posted by UnfilteredDregs
See, I was wondering about this...? It does warm the air? Does it ice up?
Yes, it does warm the air. You don't even need a thick one, just something to help you preheat and moisten the air (because it is the dry air that provokes the lungs).
If it's really thick, it will freeze simply because it will hold more moisture. But I have found the merino to be excellent in this regard. I have both a thicker one from Icebreaker, which is actually too thick, and a thin merino from Buff, which is longer, but thinner, which allows to choose one, two, or even three layers around my mouth/nose. I don't have a problem with fogging glasses either because there is more air going through the merino overall.