The new Ether Light XT Insulated Air Sleeping Mat brings Air Sprung Cell(TM) comfort to the realm of thicker air sleeping mats. Quiet and lightweight, this sleeping mat uses two types of insulation to provide three-season warmth. R-Value of 3.2 is designed for warmer-weather use. Click here to learn about the new ASTM R-Value test standard. At 4 inches thick, Ether Light XT Air Sprung Cells(TM) provides a plush sleeping experience Exkin PlatinumA(R) insulation reflects your radiant heat back to you, ThermoliteA(R) insulation prevents convective heat loss Lighter, quieter and durable 30D / 40D face fabric with Sea to Summit&';s liquid-extruded lamination is quiet, durable and extremely reliable. Patent-pending multi-function valve and supplied Airstream Pump(TM)/stuff sack mean quick and easy inflation, deflation and adjustment. PillowLock(TM) included preventing your Aeros(TM) Pillow from slipping Technical Specs Best Use - Backpacking Sleeping Pad Type - Air Pad Sleeping Pad Shape - Mummy Sleeping Capacity - 1-person Insulated - Yes Insulation Type - Synthetic R-Value - 3.2 Repair Kit Included - Yes Stuff Sack Included - Yes Packed Size - Regular : 4.5 x 9.5 in / 11 x 24 cmLarge: 4.75 x 11 in / 12 x 28 cm Pad Thickness (in.) - 4 inches Dimensions - Regular :72 in x 21.5 in / 183 x 55 cmLarge: 78 in x 25 in / 198 x 64 cm Weight - Regular: 17.3 oz / 490 gLarge: 22 oz / 625 g Gender - Unisex