Polyester USED FOR 34 SEASONSOur Sleeping Bags can be used for 34 seasonsRated temperature 525FurthermoreThese bags have a waterproof to prevent you from getting damp and keep you warmYou can get a good and relaxing sleep after a tiring day of hikingA perfect fit for both adults and children Features an adjustable drawstringPlease note our recommended temperature is for reference only Different people may have different perception for temperature FILLING MATERIAL Outer Cover Material290T NylonWaterproof and Breathable FabricsLining MaterialIt is filled superfine fibersits lightweight compact design which is convenient to carry along for any outdoor adventures and its ability to withstand extreme weather conditionsHalfcircle hood with adjustable drawstring keeps your head warmer even in extreme conditions COMBINATION DETACH The left zipper can pull the ordinary sleeping bag and the right zipper wide bag together to form a double bed We use a twoway zipper with a zipper guard For this design you can easily and quickly pull yourself into a warm sleeping bag The double zipper slider allows you to open the bottom of the sleeping bag on warm nights and also closes while lying inside You can even open the sleeping bag completely and use it as a blanket CLEAN Our waterproof outer shell is easily wiped clean with a damp cloth In case of heavy soilage the sleeping bag is designed for machine washing as well ensuring easy maintenance and longevity QUICK REPLY AND BEST CHIOCE We strongly stand behind the great craftsmanship of these sleeping bags Feel free to contact us if you with the comfort the size the weight and we will respond to your within 24 hours