With its 7 cm loft and synthetic insulation, the Ultra R3 is ready for comfortable nights in three season use. The fill helps prevent air from circulating between the parts warmed up by your body and parts in contact with outside air. With an R value of 2.9, this pad has an Exped lowest recommended temperature rating of -5ºC. - S size: 160 x 52 cm - Surface fabric: Oeko-Tex 100 certified 20 denier ripstop - Insulated with 60g/m² Texpedloft A Schnozzel pump bag is included to fill the pad without the need for blowing. Blowing would draw moisture into the pad and the use of a pump bag reduces fainting. A word or two about the three main types of Exped pads: Ultra pads boast the lightest surface fabrics and smallest weight and packing size. Versa is the middle-of-the-road alternative, with regular materials. Dura pads have a reinforced bottom fabric, making them suitable for professional level use and demanding conditions. The number next to the letter R is a rounded version of the pad