The Kelty Satellite 30 Double is an innovative alternative to a sleeping bag that perfectly matches the Kelty Sleep-Well airbed providing the comforts of home on your camping adventures. The rectangular Kelty Satellite 30 Sleeping Bag has a soft polyester-cotton liner for the comfort of home even in the outdoors. Its luxurious liner, generous elbow room, and cozy CloudLoft insulation pave the way to a good night sleep.The Satellite 30 degree double sleeping bag features two layer offset quilt construction and differential cut for maximum warmth and loft. By layering two or more sheets of insulation between the liner and shell of the sleeping bag, heat is easily trapped and maintained. To eliminate cold spots, one layer of fill is stitched to the liner, another layer is stitched to the shell, and then the quilt lines are offset so they do not lie on top of one another. Offset quilt construction is durable and maintains its shape and structure after many uses.