The Ultralight sleeping mat range has a single layer of medium resolution Air Sprung Cells to give you the lightest and smallest packed-volume mat without compromising comfort. To add warmth, Sea to Summit uses Exkin Platinum, a quiet non-woven fabric that reflects radiant heat loss back to the user and Thermolite insulation to prevent 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.