The name of the Hypersphere sleeping pads refers to icy heights, making it the perfect choice when you need an ultra-warm winter pad. A pad this warm could easily become extremely heavybut luckily, Rab knows what they're doing. Lightweight 20-denier outer fabrics and high-quality down (fill power 650) help keep the weight in check. Thanks to the down insulation, the air warmed by your body stays trapped inside the pad, preventing it from moving 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. This long and wide model suits restless sleepers and those who don't feel comfortable with regular, roughly 50 cm wide pads. - Regular Wide model: 196 x 64 cm - Suitable for year-round use - Surface material: 20-denier polyester - Filled with ethically sourced European goose down, 260 grams, fill power 650 - The down is treated to resist mois