Exped 7 DAM on top of ccf pad took me to minus 7F (no wind) with no problems.
ccf pad was in the sleeve of a double bottom diy hammock.
Like Slowhike, I love my DAM! Great when/if you go to ground. IMHO, worth every ounce of the 2.5 pounds in sub-zero temps. Lightly inflated, it wraps around you in the hammock - nice!