But if you have a sleeping bag cover, does that frost on the inside really mean much? It's no different than wet condensation on the inside of a single wall tent. If you can keep it from wetting your bag, no biggie.
I woke up with soaking wet/frosty walls. Had one of the two windows open. Light snowfall during the night. Overnight low was 22 degrees F. I had no way to measure humidity.
I had read that freezing temps will cause ice to form in the pores of W/B fabrics which of course prevents the escape of water vapor. That's probably what happened to me.
Previous Topic
Index
