The Therm-a-Rest Z Lite Sol Foam camping mattress with reflective heat technology is a warmer version of the classic Z Lite sleeping pad that has proven itself with campers, backpackers and mountaineers. The Sol air conditioning pad has all the characteristics of the original and additionally has a reflective ThermaCapture coating that reflects the radiant heat back to the body and increases the total heat of the pad by 20 percent (R value 2.0, the R value measures the insulating capacity of the material, the higher the R value, the warmer the underlay). Softer on the top for comfort and denser on the bottom for insulation, durability and protection from stones and dirt. The proprietary closed cell foam also features heat-absorbing nubs that absorb heat for a cozy night's sleep. The accordion style foldable construction is compact and easily packable for base camp or transport to the backcountry. The Thermarest Z Lite Sol Foam sleeping pad can be used by minimalists as a standalone pad or combined with another pad or air mattress for an exceptionally good night's sleep. Available in two sizes. Small 47" x 20" (20" x 4" x 5.5" folded) and weighs 10.2 ounces.Regular measures 72" x 20" (20" x 5.5" folded) and weighs 14 oz. - Made in the USA.