Design and Details: ULTRA-DRY down 850+ loft 90% down cluster premium goose down certified responsible down standard (rds) 10D nylon shell and 7D nylon lining for minimal weight and bulk Includes four adjustable straps to secure onto a sleeping pad Cushioned internal shoulder-end draw-cord Construction 10degC: sewn-through construction. drawcord in the foot section. Open up to a quilt or cinch tightly to create a 'foot pocket'. 2degc: box-baffles throughout Quiltlock system compatible: attaches to any sea to summit sleeping bag with a hood to provide extra warmth in colder conditionsincludes lightweight Ultra-Sil compression bag and storage cell Specs: Weight: 14.8oz | 420g Compressed volume: 1.8 liters Lower temp rating: 50degf | 10degc