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. - Mummy model narrower at the foot (lighter) - M size: 183 x 52 cm - Foot width 35 cm - M size: 183 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.