This Camping Inflatable Air Sofa is a well-knitted, light, and thin inflatable lounger made of high-density, waterproof 190T rip-stop polyester built to withstand a wide range of flat surfaces such as sand, grass, snow, water, and even gravel. The upper back support and the carefully designed, ergonomic headrest provide the ultimate comfortable experience. The lounger is easy to inflate as you only have to open its mouth into the wind to inflate it if it's windy outside. If it's not windy, you can just run for a few steps with it to inflate it. Once inflated, it will stay that way for approximately 27 hours.