At four inches thick, the Ether Light XT Insulated Mat brings Air Sprung Cell comfort to the realm of thicker air sleeping pads. Using two types of insulation for three-season warmth, this sleeping pad is lightweight and quieter than a traditional air pad. The XT Air-Sprung Cells are constructed using loops of 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 Summits class-leading reliability. Ideal Product Insulated pad features high-loft fiberfill and reflective fabric, to prevent heat loss and radiate heat back during sleep; non-slip 30D/40D nylon face fabric is durable and quiet Multi-function valve for fast inflation in just a few breaths (using integrated Airstream Pumpsack), one-way deflation for quick packup, and fine-tuning of air pressure. Regular size measures 66 x 21.5 x 4 inches, packs to 4.5 x 11 inches, weighs 1.1 pounds; includes stuff sack, field repair kit, and PillowLock patches for securing a Sea to Summit pillow to mat. Single-layer Air Sprung Cell construction mimics a spring mattress; women’s pad is cut narrower at the shoulders and wider around the hips and knees.