Sea To Summit Ultralight sleeping mats use a single layer of medium resolution Air Sprung Cells to give you the lightest and smallest packed-volume mat, without compromising your comfort.__ For warmth, they use Exkin Platinum, a quiet non-woven fabric that reflects radiant heat loss back towards your body, and Thermolite insulation that prevents convective heat loss between your body and the ground. __ All Sea to Summit sleeping mats come with a quality stuff sack, a repair kit containing six self adhesive patches for repairing punctures in the field, and a spare silicone one-way valve flap.__Weight: 480gSize: 183cm x 55cm x 5cm Size when rolled: 23cm x 10cm diameter181 air sprung cells__ You also get a free Sea to Summit Air Stream Pump Sack which can be inflated with a single breath, and within just two to three cycles your sleeping mat will be fully inflated and ready to go ... More info