- Feb 28, 2009
- Valdosta, GA
I also agree about down. My next bag will be down. The Valandre Bloody Mary is high on my list. I have plenty of synthetic bags to use if space is not any issue. All my down bags have been warmer, lighter, and pack smaller. My experience has been the same as many mountaineers; the vapor from your body heat condensation on the outside of the bag during very cold nights. Eventually it continues to build up until your bag is completely soaked. I don't have a problem unless it's very cold. I now use a vapor barrier liner, which you can make yourself, or buy from places like REI. No more wet bags. This keeps me from waking up in the middle of the night freezing because my bag is wet. I won't go out in sub 0 temps with any bag, and especially a down bag, without a vapor barrier liner.