With its 7 cm loft, the Ultra R1 is ready for comfortable nights in summer and indoor use. As there is no insulation, the pad packs down very small and is light compared to its loft. With an R value of 1.3, this pad has an Exped lowest recommended temperature rating of +10ºC. - M size: 183 x 52/35 cm - Surface fabric: Oeko-Tex 100 certified 20 denier ripstop 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.