I have the original WB Yeti style torso UQ, which layered 4 layers ( 3 removable) layers of Climashield XP. ( OK, mine is probably actually 1 layer XP and 3 layers of Combat, long story) Each layer is ~ 1 sq yd.
Cannibal finally got cold in this at minus 5, but only on top using an old 40F Coleman bag. He felt he was still OK on the bottom. Also, I think it had a sil-nylon cover functioning as a vapor barrier.
http://www.hammockforums.net/forum/s...ead.php?t=2682
There were some neat pictures that are gone now!
We( my son or me) have only used it into the 20s, but using only 3 layers and NO VB, have been toasty. Mine (with Combat)weighs about 20 oz, I think Cannibals(all XP) weighed about 17.
The thing about this design is: no reason in the world not to add 1 more layer of CS if it is going to be below zero. I get about 20*F protection(maybe a little more) from the 1 layer of 2.5 oz CS (OK into hi 40s).
Or you could put some IX between layers. How ever many layers you use, if you add a space blanket on top of the quilt, or a VB, or use VB clothing, you can probably pick up and extra 10 to 20F, and more importantly help keep the quilt dry. All for an oz or so(torso length) It is worth experimenting with.
Don't know for certain about any of the newer types of CS. You might want to check out thru hiker:
http://thru-hiker.com/materials/insulation.php
Looks like this Apex has about the same insulation value (CLO .82 oz ) as the XP did. Wonder what the dif is?
Bookmarks