I just got done from testing my hammock sock and want to post a question and some obervations while they are fresh in my head.
This is my 3rd or 4th night using my hammock sock. The other times I did not see any noticeable condensation. The outside temps were only in the high teens and twenties. This time was a completly different story. When I got in my hammock the outside temp was 8 F with a wind chill of -2 F and a dew point of -3 F. When I got out it was 4 F with a wind chill of -7 F and a dew point of -6 F.
After about an hour I started to notice some condensation. Nothing too bad. However by hour 3 I noticed a lot of condensation. I used a fleece to wipe off some of the condensation. But it reformed pretty quickly. It got to the point that whenever the hammock moved I felt a little mist in my face. Not to fun or good for me keeping my bag dry.
I was really toasty other than this. The temp inside the sock on the ridgeline above my chest was in the low 40's. Around waist level it was in the high 20's. The sock was doing a good job of blocking the wind and traping in the heat.
The bottom 2/3 of the sock is DWR and the top 1/3 (from about shoulder to shoulder) is uncoated ripstop.
Is this just a cold weather condensation issue? Any thoughts on stopping this? I know this has a lot to do with dew points and nylon breathablity.
I am considering adding a noseeum 'window' above where my head is to vent some mosture. But that would vent some heat. This could give the effect of a double wall tent vs a single wall.