Therm-A-Rest Z Lite SOL™ Sleeping Pad - Regular - Blue/SilverAlways a favorite of the ultralight elite, the Z Lite SOL expands upon the utralight performance of the Original Z Lite by adding our reflective ThermaCapture coating to capture radiant heat and increase overall warmth by nearly 15%. Factoring in the system of heat trapping dimples, the Z Lite SOL has an R Value of 2. 0, making it perfect for use on its own in warmer weather or layering under another pad for extra warmth in the cold. The proprietary