A long term favourite of the ultra-light athletes from Therm-a-Rest, the Z Lite Sol mattress is their lightest, most compact closed-cell mattresses. Both the Z Lite SOL and the original Z Lite feature a compact accordion-style shape and heat-trapping dimples. The Z Lite SOL however adds Therm-a-Rest’s reflective ThermaCapture™ coating that helps capture radiant heat, increasing overall warmth by nearly 20% and this works best with the reflective side uppermost. The combination of foams adds comfort on top and durability underneath. The proprietary foams are softer on top for extra comfort and denser on the bottom for extra durability. Therm-A-Rest Z Lite Sol (Regular) Features: Cross Linked Polyethylene ThermaCapture™ Technology Accordion Style Design Thickness 2cm Dimensions 183cm x 51cm Packed Dimensions 51cm x 14cm x 13cm Weight Approx 410g R-Value Rating 2.0 Stuff Sack and Repair Kit Included