The Ultralight sleeping mat range has a single layer of medium resolution Air Sprung Cellsâ„¢ to give you the lightest and smallest packed-volume mat without compromising comfort. To add warmth, we use Exkin® Platinum, a quiet non-woven fabric that reflects radiant heat back to the user and Thermolite®; insulation to prevent convective heat loss between your body and the ground. All Sea to Summit air 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 insert.