Thermarest Z Lite Sol
Pretty much the lightest, most compact closed-cell mattress you can get. It accordions for fold-down, so you don't have to roll it, and the dimples on the surface trap heat. It is meant to be used with the reflective ThermaCapture coated surface facing up to help capture radiant heat, increasing the warmth of the mattress by 15%.
R-value: 2
Weight: 410 g
Width: 51 cm
Thickness: 2 cm
Length: 183 cm
Packed size: 51 x 13 x 14 cm