1. Simply inflate the material and put the bottle inside for easy packaging. 2. Better protection than regular buffers, perfect for storing and transporting bottles of wine, Japanese liquor, etc. 3. The thickness is about 0.6 inches (1.5 cm) when inflated and is less likely to be affected by the outside air, so you can expect to keep cold as well. In addition, if you use it with a coolant agent, it can be used for outdoor activities such as BBQs. 4. The air in the bag is designed to prevent backflow so you can carry it with confidence when traveling. 5 Stores flat before use so it doesnt take up much space to store your materials.