Exped UL Synmat 7 vs. Exped UL Downmat 7 vs Thermarest Neoair All Season for using with a two person quilt (hence why the mummy shaped XTherm wouldnt work well). I would say this would need to be good for ~25* F.
What about mixing and matching?
Does the Downmat's listed weight include the pump it requires?
Would the vertical tubes or the horizontal tubes be better for mating two pads?
Are the Neoairs really that warm without any real insulation?
Other opinions?

