Originally Posted by JohnSawyer
IX is ok, but not compressible... it's too much of a vapor barrier to me and I ended up with a damp backside when I used it... it IS really light...
I'd go with climashield over IX. From what I've read, it takes a bit of work to use and IX UQ properly and sometimes sleeping on your side breaks the seal and let's cold air in. Climashield appears to require less fiddling and after ordering 2 yards of it, it's pretty darn light. Not to mention you'll need multiple layers with IX and only one with Climashield.