The Therm-a-Rest NeoAir XTherm Mattress is a camp mattress for winter expeditions. The multiple layers of ThermaCapture™ reflect your very own body heat back at you, without adding any additional weight, and helping to create an R-value of 5.7. The mummy shaped version comes in at 15 ounces (1lb, 4oz for size large), which really keeps the weight down when your pack is already laden with other gear. The pad is 2.5 inches thick when fully inflated and packs down to about the size of a 1 liter water bottle when it's time to move camps.
So sorry, but only 4 items are allowed for comparison, so we're comparing the first 4. I blame the gnomes and so should you.
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