I've used a scarf before in freezing weather. Apparently I breath a lot since the scarf, and these darn masks, get wet quick. The scarf does freeze up, as does my beard, but can be rotated around. The masks, especially the paper ones, don't seem likely to hold up so well. But I don't do crowds outside so it's not going to be a problem for me.
Well, that's what I'm curious about, and if it might be a problem, is anyone pursuing a solution?
I have a ski mask with a breathing port with "regenerative heating" for incoming air (inhalation) by capturing the heat of previously exhaled air. It entails a kind of copper screen to do the regeneration, but it would not be considered a germ filter as it is presently set up.
Another possible option is I noticed a couple of masks in the grocery store with built-in check valves. Closing on either inhalation or exhalation would seem to help with this possible problem, but yes or no?
Anyhow, I'm kicking it around in my own mind, but wondered if anyone else has addressed the problem,
if there really is one.
Be prepared.
POSTED before seeing Ben's remarks. That breathing through the edges of a solidly frozen mask occurred to me, too, but it still would be somewhat effective in blocking
outoing germ clouds --somewhat like face shields.