The name Hypersphere refers to heights, making it the right choice when your route includes elevation changes or if you simply want an exceptionally lightweight yet warm winter sleeping pad. The low weight relative to its warmth is achieved by using 20-denier fabric on both the top and bottom surfaces, combined with high-quality down insulation (fill power 800). Thanks to the down, the air warmed by your body stays in place inside the pad and does not shift to areas where it could release heat into the cold outside air. For added sleeping comfort, the thicker air chambers along the edges help reduce the feeling that you might "roll off" the pad. - Long Wide model: 196 x 64 cm - Suitable for year-round use - Surface material: 20-denier polyester - Filled with ethically sourced European goose down, 190 grams, fill power 800 - The down is treated to resist moisture - The valve has separate settings for inflation and deflation - Includes a pump sack, storage bag, and repair