The All Season version of the NeoAir Sleeping pad has an R value of 4.9 making it suitable for sleeping on snow in winter. See Sleeping Pad R-Values. If you’re familiar with the NeoAir XLite, the All Season version is a good deal quieter than the original and has a much softer “hand.”
Therm-a-Rest packages the All Season with a combination external pump/stuff sack that has a nozzle you fit over the single valve. It’s worthless and kept popping off the valve when I’ve tried using it. If you want a stuff sack style pump that works better get the Big Agnes Pump Sack, I reviewed last year. It has a cord lock that you secure over the pad’s air valve and can’t pop off.
The point of using the stuff sack pump is to avoid filling your sleeping pad up with moist air from your lungs. No worries though, you can blow it up directly if you want without seriously compromising the internal insulation because it is synthetic and not insulated with goose down like the Exped DownMat sleeping pad. I suspected this but called Therm-a-Rest customer service to confirm it, and they said I wouldn’t experience any insulation degradation unless I planned to be out for more than 5 nights in freezing weather.
Therm-a-Rest customer service did emphasize that one should not try to dry the inside of the NeoAir All Season (or any other NeoAir model) by putting it in a dryer. That is bad because the heat will make the seams fail. Instead, open up the valve and hang it upside down so that any accumulated moisture can drip out. Then place it in a dry room with the valve open or next to a dehumidifier to let the inside dry out.
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