Auto-lock valve type single comforter compression pack, M size, 1 piece I used one, but the size of my futon has changed, so I am selling the remaining (unused) one that I will not be using in the future. I plan to take it out of the box, fold the box, and include it for shipping. There is a part of the box side that is bent, but the storage bag itself is in a clean condition. Easy-to-use wide zipper (110cm wide, 100cm deep) With the auto-lock valve type, you can easily open and close it by attaching a vacuum cleaner nozzle, and air will not flow back. You can use it for comforters with 70% or more down, but it does not seem suitable for feather futons or futons with a lot of feathers. Storage capacity per pack 1 comforter 2-3 summer blankets