Just came in from another test in this set-up. Temps got down to 19* F. We had a very light dusting of snow. I used the same hammock and clothing set-up as above in my first report. Well, I slept very hot. I had to leave the ID bivy, SOL bivy, and the Exped Wallcreeper unzipped about a 7" opening to let some heat escape. I removed my GAP wool sweater, wool balaclava, and axeman leather mitts and used as a pillow and stuffed towards the foot and head end to avoid any cold spots. I consciously noted how the SOL Thermal Bivvy really radiates and reflects your body heat. Because the SOL Thermal bivvy is inside the down sleeping bag, there is very little heat loss and the heat can really build up inside this thermal cocoon. I also feel that the SOL Thermal bivvy works best around the hammock, instead of just laying inside the bivvy in the hammock. I can really feel the heat being reflected and radiated on my backside. Having the ends completely enclosed really helps hold in the heat, also. The modifications done to the bivys help completely hold in the heat and allows us to minimize our pack space and use a small diagonal tarp and still have the ends of our hammocks protected from the elements. Or use no tarp at all and just the WPB ID South Col II eVent outer bivy.
Cheers and Happy Hanging!~
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