The Friendriver Xl Size Upgraded Version Of The Camping Sleeping Bag Is Nylone ?? Material:The nylon on the outer surface is a high-quality waterproof and breathable material, and the inner surface is a layer of polyester soft cushion, which allows you to lie on a soft and comfortable cushion, the filling is Microfiber. Large Size Sleeping Bag:XL Size sleeping bags for adults,more space than normal sleeping bags,the widening style camping bag is(86.6*31.6 inches), which is enough for adults or children to move freely and find the most comfortable sleeping position for themselves. Applicable Season:Our sleeping bags can be used in multiple seasons,Microfiber cotton can give us enough warmth,Microfiber can make us have a good place to sleep anywhere, and the ventilation effect can keep us from being stuffy. Easy to Install and Easy to Carry:Backpack sleeping bags, each sleeping bag has a storage bag, you only need to pack the sleeping bag when not in use, and you can carry it with you when you go camping in the wild. Quality Assurance:Friendriver We are so confident in the quality of our product that If you are unsatisfied, simply contact us to return the product for a full refund.If you have any other questions, please contact us, we will solve it for you as quickly as possible.