Originally Posted by
KirkBeiser
Imo you are still in the theory world when you say you might not notice. I spent 20-30 days camped next to lakes and creeks at least every other night in the Sierras two straight years. I also used the same down sleeping bag for over 100 straight days (minus the occasional hotel). I'm certain that my sleeping bag absorbed a little moisture but I didn't notice a loss of insulation. If this isn't going cause problems then I think you are talking from a purely theoretical standpoint. I think your argument applies more to winter camping where the sleeping bag absorb moisture at night and it freezes in the bag and it continues to happen night after night.
I am inclined to agree and also to add that most of us do not tour in conditions where the bag doesn't thaw out during the day most if not all days, allowing for some airing/drying out. I know that while I ride at times with overnight lows well below freezing at times, I would be inclined to go somewhere/sometime else if daytime highs were not expected to be well above freezing most days.