Get this bivy for...
- Gender: Male
- Familiarity: I've put it through the wringer
I bought this bivy for winter mountaineering. I have had condensation like others mention. But when it gets COLD (down below 0 F) I just end up with some frost on the outside of my bag, and no dampness.
No, it isn't particularly waterproof. If you seal the seams well it supposedly (according to the kind folks at B.D.) will hold up for about an hour in the rain. I don't plan to find out.
It is awesome for winter in the mountains. Keeps me warmer than a tent. Packs tiny. Single wall, four season construction is perfect.
My only complaint is the foot-box area. With a Neo-air all season pad and a zero-degree bag, the bivy compresses the bag's down at my feet. I haven't suffered yet, but I wonder how much of a liability this is. Compressing your down is never good...
The photo is from Canyonlands, where I had no condensation problems :)