Originally Posted by warbonnetguy
yb, good thread, now it will be easy for folks to find. question, how many degrees does a vb (non-reflective) add to the low temp of your uq?
another point, is that i have used a sil shelled synthetic uq several times in several different conditions, and had similar results, maybe even better (no moisture build-up) i think there is a HUGE difference between laying directly on raw ccf and having a vb between the uq and the hammock. it's almost as if it breathes just enough to avoid moisture build-up.
grizz, here's an idea i've been throwing around for a down uq with a sil shell.
outer layer shell: sil, inner layer shell:netting or breathable ripstop, second inner layer shell sil sewn only on 3 sides and left open on one end to flip inside-out leaving the breathable shell is exposed for drying. this way, when inside out it has one breathable side, but when right side out, it's sil on both sides. so you have a built in vb, and a sil outer shell for more water resistence.
i've noticed a difference in full sil uq's and full breathable uq's. if i'm exposed (small tarp) i can feel a gust of cold wind somehow make the uq cold for a second, like it is penetrateing or sucking the heat out. this was not the case when using the sil uq. a good winter tarp probably stops this from happening as well which most will have in cold conditions. i could tell a difference though. it may have been really breathable ripstop i was using, the stuff i have now is parachute 1.1 so it has a very low cfm (air permeability) so i'll have to test it specifically for that and see if it's similar or not, but the sil outer shell would def stop wind well so it might be worth doing, if ysing a winter tarp though, both wind and water resistence may no longer be an issue though.
I used Frogg Toggs on occasion; usually when sleeping in clouds in the cold, they worked pretty good and I never seemed to suffer any 'excessive' moisture build-up.
I used the sil shell WBG is talking about and never had any moisture build-up in it the next morning; expected to, but didn't. However, I never really noticed a difference in temps using the shell. The only exception to that would be in high winds under a non-winter tarp when you can actually feel the breeze thru the quilt; the shell almost eliminated that and kept me much warmer than without.