Exped synmat ultralite 7 lw camping mat yellow the new synmat ul 7 offers unmatched comfort and warmth at a minimal weight and packed size size m weighs only 460 g at size 183 x 52 cm and sumptuous 7 cm thickness and an excellent r value of 31 all this at the size of a liter bottle the new ultralight fabrics are extremely lightweight and compact the abrasion resistance remains high puncture resistance is lower than with our standard fabric high frequency welded seams flatvalve te