The Sea to Summit 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, we use 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.   Single Layer Technology - Constructed as a single layer of medium resolution cells.Ultralight Airsprung Cells Insulated Mat Features: Construction: Single Layer Length/Width XS: 128 x 55 cm, Small: 168 x 55 cm, Regular: 183 x 55 cm, Large: 198 x 64 cm no. Air Sprung Cells XS: 132, Small: 174, Regular: 181, Large: 225 Rolled Size XS: Ø9 x 23cm, Small: Ø9.5 x 23cm, Regular: Ø10 x 23cm, Large: Ø10.5 x 26cm R Value 3.1 Shape Mummy Thickness 5 cm Weight XS: 349g, Small: 430g, Regular: 480g, Large: 595g