Yes, below 20, I wear the face cover. Last Monday, I came in to work at +1, and my water pipe had frozen. I know to blow back the water, but the bit still was hard and unsuckable. I am still
working on my hands at that temperature, and so far they have been the only issue, everything
else is toasty warm. Now, if I can just get the hands that way. I still have fogging issues, even
though I have the patch of screen to allow exhilations.