The UltraLight Insulated Mat has a tapered shape and single layer of medium resolution Air Sprung Cells™ to minimise weight and bulk without compromising on comfort. THERMOLITE® fill and Exkin Platinum® fabric combine to give you an insulation rating (R-Value) of 3.3 for 2.5-season use. Other features include a multi-function valve for easy inflation, deflation and fine tuning of air pressure and an Airstream Pumpsack for easy inflation while also serving as a stuff sack during your adventures.