Thinness - which Neoair, the Xtherm or the All Season? The All Season has been out for something like a year now and chances of any bugs to be worked out, the newer Xtherm, I'm guessing from the context of weight Xtherm/Xlite , is only just barely coming out now so unless there is an urgent trip, suggest giving it 6 months for bugs to be worked out. All Season has a 70d bottom 75d top, the Xtherm is I think 30d bottom 70d top so they got some of that weight saving from thinner fabric. The Neoair original has 30d top and bottom.
In the context that someone is using an original Neoair, by definition of its lower R value, *if* it were to fail its generally warmer conditions and/or someone has warmer sleeping bag, in the context of the high R-value newer mats, the context is much more cooler and/or little other insulation, so *IF* the mat were to fail the consequences are more significant. That is what is I referring to, not just probability but impact. Now in *this* thread, generally clothing compresses less than say a down sleeping bag, so more tolerant of mat failure?
As Xtherm is coming out in early April, 6 months later is October so that's a good time for the (then) cooler seasons. I was thinking of getting an Xtherm too, or the Xlite Woman's but I was hoping for these to get into owner's hands first plus I bought an Xlite small in January and immediatelyreturned it due to excessive taper, not something you'd seen on the likes of say Prolite short.