I've spend way too much money on different scarfs, neck gaiters, face covers of different fabrics and performance material to keep my face warm during winter and moist free over the years. I instinctually tried mouth breathing, but all it did was draw fabric closer to mouth and made things wetter. I think maybe I didn't fully transition to breathing out through nose because it feels unnatural. Maybe it's one of those things where the solution is obvious but hard to adopt. So now I'm wastefully going through a few boxes of masks during winter months. TBH, only time I remember breath through mouth and exhale through nose is maybe meditation videos. Certainly not in any of the random winter wilderness survival videos. Which is why I was curious if this is some like cultural knowledge being passed.
We discussed this among ourselves when in kindergarthen and school while doing the mandatory skiing classes. The most sensitive part is the nose so you breath out there to warm it up. Less dripping nose as long as you can keep it up. If you forget, the nose directly freezes up and your nose will be dripping the rest of the trip :-)
I was so baffled that the heat exchangers were so cheap, I had always imagined them to cost a fortune so I didn't even think of getting one until a few years ago. But I guess they did cost a lot more 20 years ago...
