Thermarest neoair xthermmax sleeping pad description light is right in any season the neoair xtherm max uses a matrix of triangular cells to reduce convective heat loss layers of lightweight thermacapture reflect radiant heat back at your body while you rest the construction used soft fabric thats quiet and comfortable to sleep on and has non slip texture so you stay onboard through the night features top is high tenacity nylon bottom is heat reflective aluminized polyester tr