The new Ether Light XT Insulated Air Sleeping Mat brings Air Sprung Cell 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. The XT Air-Sprung Cells are constructed using loops of a strong, flexible material to provide a plush sleeping experience. The uprated 30D / 40D face fabric is quiet and durable, and the lamination technology continues Sea to Summit's class-leading reliability. R-Value: 3.2 Dimensions: 78 in x 25 in / 198 x 64 cm Packed Size: 4.75 x 11 in / 12 x 28 cm Thickness: 4 in / 10 cm Weight: 24.3 oz / 690 g Fabric: 30D / 40 D nylon with anti-microbial liquid-extruded TPU lamination 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 provides a plush sleeping experience Exkin Platinum insulation reflects your radiant heat back to you, Thermolite 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/stuff sack mean quick and easy inflation, deflation and adjustment. PillowLock included preventing your Aeros Pillow from slipping /