"I agree with Dave at Oware. I've never had a customer say anything about misting either."
Well, I guess you have now. :-)
I have the Hex Hammock Tarp in Spectralite, which I used over a JRB hammock last month in Vermont. We got caught in the mother of all rainstorms, the kind that, had I been driving, I would have pulled off the road because I couldn't see the road anymore. Fortunately, we had gotten off the trail and set up just prior to the rain starting, and I was lying back in the hammock when the skys really opened up. The tarp was maybe 1.5 to 2 feet over my head, and it was definitely misting through the tarp so that the spray kept landing on my face. Since we had just set up, I doubt it was from condensation under the tarp, and it continued for the three or more hours of the downpour.
Understand that this is an observation, not a complaint. I basically filed it under "yeah, SilNylon tarps do that." I'm not suggesting that torrents of rain poured through, turning the hammock into a bathtub; it was just a bit of misting. More importantly, when I go out again I'm going to take the 6.5 ounce Spectralite tarp rather than a 1 pound plus PU coated tarp, and just deal with whatever misting occurs. I'll live, although I *may* just try to add a bit more of a silicone coating on the underside of the tarp.
Okay, I'm reevaluating the above statement. I think that if I expect severe rain I *will* take the PU-coated tarp, for a few extra ounces, and enjoy a mist-free evening; if it's going to be drier, then the SpectraLight tarp goes with me for the lighter weight. I guess as I get older I get crankier about comfort, and the inevitable trade-offs between comfort and weight. For me, weight isn't everything, although it's obviously still important. But if I really need something, ...