1 - Heat transfer from your body to the quilt is mostly conductive since it's touching...convective between your body and the insulation is negligible.
2 - Basic assumption that it's a closed system is false. Your body is always losing heat to the outside, even inside the quilt. Thicker insulation just slows the transfer enough that your body can produce heat at the same or greater rate as it's lost. So again...anything that slows heat transfer is better.
Personally, I think the untreated stuff is just more comfortable so I use it for my hammocks...at least for the $1 bin stuff I use. If I thought it would make a real difference in warmth I might switch to DWR.
I'm even half considering making a silnylon hammock just to see what it really feels like...I've heard a few other folks say it's not so bad, and the Crazy Creek I tested didn't give me condensation problems. Making an insulated hammock w/ sil as the body and DWR as the shell should help with moisture inside the insulation, too. 'Cept all of the sil I have at the moment is 1.1 oz.
“Republics are created by the virtue, public spirit, and intelligence of the citizens. They fall when the wise are banished from the public councils because they dare to be honest, and the profligate are rewarded because they flatter the people, in order to betray them.” ~Judge Joseph Story
- My site: http://www.tothewoods.net/
- Designer, Jeff's Gear Hammock / Pack Cover
IMPOSSIBLE JUST TAKES LONGER