Originally Posted by
Passinthru
I have used a 40* bag between the double layers of my DD Frontline. The bag was in the closed position so I actually had double thick insulation. Also between the layers - on top of the bag - I used a windsheild reflector. I was also in another 40* bag inside the hammock. Got down into the 30's and windy and slept warm
I think that the material used in the two layers is the same size but I don't think the bag compressed as much as it would if I were laying directily on it.
Maybe the need for room to "fluff" is not that critical.