Just saw this on BPL and picked one up for myself... $12.99 shipping and pad is free. Figured it's worth a shot for $12.99 - worse case I'll have the beginnings of a putting green in my gear room.

R value of 21, weighs 9 oz for the 1/2" x 24" x 77" version.

http://www.birdieball.com/scripts/pr...FShp7AodhH4Aig

From the website:

-Textured Open Cell top surface is soft and prevents sleeping bag movement on higher friction top soft surface.
-R-value 21 unaffected by humidity
-Prevents 97% of radiant heat transfer
-Vapor barrier Prevents condensation
-Does not promote mold or mildew