>I was wondering what kind of temps could comfortabley be attained in a hammock setup of a HH,with SS and JRB old rag as a bottom quilt and useing a no snivler top AND a nest as extra top with a JRB weather shield???
An HH with a JRB Nest as bottom quilt and a Ray-Way Deluxe with Xtra Layer 3D as top quilt (SS would be redundant, and I didn't use my JRB Weather Shield), plus clothing, worked for me at -15F, although it was a bit on the cool side. A JRB Old Rag Mtn would be warmer than the Nest, the No Sniveler and a Nest would be warmer than the Ray-Way quilt, and the JRB Weather Shield would add something. I'd be comfortable taking that combo to -25F (and I probably will, once JRB have their larger quilts available this fall).
I posted my series of cold-weather hammock tests in this BPL thread. I also detailed the clothing I wore in the hammock, with weights and lofts.
I bought a Gossamer Gear ThinLight Wide 1/4" sleeping pad and a JRB Weather Shield bottom cover for my brother as a much cheaper alternative to the HH SuperShelter underpad/undercover. The GG pad is much more durable than the HH underpad, and it can be used for ground sleeping as well. We both used this setup, and it was plenty warm down to the low +40F range (the weather didn't get down into the 30's on my recent trips).