Originally Posted by 2Questions
So your thought is that the differential of temp and humidity has to be more extreme for canvas use...and that a fabric less breathable will suffice to that point? This past weekend I used our 1.1oz calendered ripstop as a hammock topcover and condensation definitely freezes on the inside with a temp about 30°. Will M90 act any differently?
I guess it depends on whether weight is a factor. If you're pulling a pulk the extra weight of a canvas sock might not matter. The top half of my hammock sock-tent is Pertex Microlight, which I believe is similar to M90 in that the weave presents a lot more surface area on the outside so moisture that condenses on it and travels on the fibers by capillary action can evaporate (or freeze and then sublime) faster there. At least that's the theory, as I understand it. When we were at Mt. Rogers three years ago I had substantial frost on the outside of my sock in the area just over my head, but only a little bit on the inner surface. As you recall, that was with temps below zero. Up around 32 I've seen a lot more condensation, but that was liquid. I believe more moisture was on the outside, but it was hard to quantify.
My question about using canvas primarily for extreme cold may not apply to socks used under tarps. I may have been thinking of canvas tents or anoraks used without additional waterproof layers. That's when you really don't want to have rain or even heavy wet snow.
That pretty well exhausts my knowledge of this. Fourdog? Help us!
By the way, with your 1.1 calendered ripstop, did you have the shiny side in?