"I just got my Mountain Hardware 3rd Dimension and have spent 2 nights in it so far. It has "Conduit SL Membrane" in it, taking the standard 3rd dimension from 0 down to -5 F. This bag is compressible, fairly light, it fits snugly into my pack sideways, and has a down-like feel. It kept me toasty inside my tent on a windy 15 degree night in January on top of Mt. Mitchell, NC, highest point east of the Mississippi at appr. 6,770 ft.
I'm looking foward to years of sleeping in this bag! Go Mountain Hardware!"