Originally Posted by canoeski
I tried. Believe me, I tried.
I'm a believer in VBL's and they have worked well for me in cold-weather ground mode....I used a Mylar blanket on top of the UQ, so no problem there....... I modified a urethane coated nylon VB liner sack with arms to increase mobility and decrease claustrophobia........... pull it up and secure it, then sit in the hammock and swing the legs in. So far, so good. Then the Houdini act started and with a lot of grunting............ After 10 min I scrubed the plan, and went back to standard mode...I left the bug net zipped back and had minimal frost the next morning despite colder temps. It was mostly from exhalation vapor......................
For me, a sack of any kind, whether VB or fleece bag liner, inside another bag/quilt, always sounds very claustrophobic. This coming from a guy who closes Pea Pods down to a small vent- or rarely even closing it all the way- with no comfort problems! I think I would have abandoned the VB also.
I have always wanted to try the Warmlite VB clothing
with "fuzzy stuff" liner. A shirt with full sleeves, for example.
Wisenber has been experimenting with the tops with what seems to me like really good results. I may have to finally break down and try them.
Sounds like your Mylar under blanket worked as planned, functioning as a VB. Sounds like you didn't have much trouble with the top condensation if you left the zip open. But there was probably some that would have started showing an effect after a few more days. What I wonder is was there any condensation inside the bag, even if not enough to effect loft so far?