Exped synmat lite 5 m description new for 2014 with an r value of 25 the exped synmat lite 5 sleeping pad and its warm microfiber insulation and lightweight packability allow even ounce counting backpackers to enjoy confident comfort for 3 season use the synmat lite 5 employs separated air chambers with welded through baffles to provide 20 inches of comfortable support while raised air only outer cells keep you centered on the pad high performance 75 denier fabric is air tight sli