At four inches thick, the Women's Ether Light XT Insulated Air Sleeping Mat brings Air Sprung Cell comfort to the realm of thicker air sleeping pads. Featuring additional Thermolite insulation (compared to the unisex model), this pad provides three-season warmth for women backpackers. 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. The sleeping pad shape is narrower at the shoulders and wider between the hips and the knees. This guarantees greater comfort regardless of sleeping position, and perfectly complements Sea to Summit's women's sleeping bag range.