Nylon Imported Super comfortable and durable upper material: nylon is waterproof and durable, lining: 100% polyester, breathable and skin-friendly, high-quality polyester can maintain the temperature between 55 to 60 degrees°Between F, it provides people with an ultra-comfortable sleeping environment. This sleeping bag is professionally designed to be waterproof and weatherproof. The smooth zipper closure makes it more convenient. Our sleeping bag measures 83inch cm long x 30inch cm wide, approximately 203.2cm cm long x 30inch cm wide. It can accommodate one adult or two children Compact and lightweight, easy to carry. Unlike down sleeping bags, our envelope sleeping bag can be easily rolled up and placed into its carrying bag, compressing to a height of only 11inch and weighing approximately 27.9cm pounds and 1.7kg ounces. Very suitable for backpacking enthusiasts Versatility: You can use our warm sleeping bag in various weather conditions without the need for a sleeping bag liner. This is a perfect sleeping bag, suitable for outdoor camping trips, girlscouting, or mountaineering, and can also be used as a camping quilt Reliable Customer Service If you have any quality issues, please send us an email, and we will respond within 24 hours.