Still a favorite of the ultralight elite, the Therm-a Rest Z Lite Mattresses are Therm-a-Rest's 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 adds Therm-a-Rest's eflective ThermaCapture™ coating that helps capture radiant heat, increasing overall warmth by nearly 15%. The proprietary foams are softer on top for extra comfort and denser on the bottom for extra durability. Wherever you're headed, a Z Lite mattress is the right choice for ultralight warmth, durability and comfort. Features and Specifications Advanced Warmth: ThermaCapture™surface reflects radiant heat back to your body, amplifying the warmth of the heat-trapping dimples by 15% (Z Lite SOL™ only; for best results, use reflective side-up.). Compact Design: Folding design is compact and easy to pack. Extra Durable: Virtually indestructible closed-cell foam provides lasting, economical comfort. R-Value: 2.0 Weight: 410 grams Dimensions: 51 x 183 cm x 2 cm thick Packed dimensions: 51 x 13 x 14 cm Colour: Lemon/Silver and Blue/Silver Material: Polyethylene Foam type: molded closed cell Made in USA Therm-a-Rest Z Lite SOL Lightweight Closed Cell Foam Sleeping Mattress - Size Regular