NeoAir pads have astounded hikers for a couple of decades, with their ingenious structure: Their insides are filled with ultralight separating walls (Triangular Core Matrix), stopping air from circulating between spots warmed by your body and spots in contact with cold outside air. The result is that this compact and very light pad is warm enough for year-round use. The downside of the baffle structure has been that NeoAir pads have made a rattling sound when tossing and turning, but this new Xlite NXT pad makes a fraction of the sound of the original models. It is also thicker than the previous version, without any weight penalties. Always inflate the pad with the included pump sack. You could inflate it by blowing, but this introduces moisture, which accumulates in the pad, with no way out. - 183 x 64 x 7.6 cm model, regular wide size - Surface fabric: 30 denier ripstop Nylon - ThermaCapture material layer under the surface fabric reflects a part of your body's thermal radiation b