I had the gortex one 07-09 and on a couple of occasions woken up under snow and been warm and dry. The olive drab colour ones (not the Camo ones) were really good. 2 weeks of straight rain on the west coast sleeping on wet moss and the bag was dry at the end of the exercise. Chuck a fly up over your bivy and it's pretty fool proof. If hunting I'd use a ground sheet under my sleeping mat to keep it really dry.
Bookmarks