Sometimes less is more: the Women’s Ultralight Insulated Air Sleeping Mat saves weight with its pared-down shoulder girth and shorter length compared to the unisex model. And sometimes more is more: it adds extra Thermolite® insulation to provide tested three-season warmth for women backpackers. The uprated 30D / 40D face fabric is quiet and durable, and the lamination technology continues Sea to Summit’s class-leading reliability.