I'll be attempting Mt Adams (12,280' / 3,743 m) later this year. I have the XTherm and Xlite and see myself using the Xlite more even down to 30F. Therma-a-Rest NeoAir XLite … (Regular) 1 … New comments cannot be posted and votes cannot be cast. And here to see the price of the Thermarest Xtherm air mattress. It's what I use. If Bear Mountain had not been open, I might not have even tried to exchange the pad. Therm-a-Rest NeoAir Xlite Max (Regular Wide) Visit the Therm-a-Rest Store 4.7 out of 5 stars 14 ratings | 4 answered questions Currently unavailable. It is excellent. Should You get Sun Exposure in the Morning? Fine if you’re just staying in one place with your family. When it comes to warmth: Xtherm>>Tensor Alpine>Xlite>Tensor, When it comes to weight: Xlite<