You can get a ¥200 discount if you don't need the box. This is a very rare, not-for-sale item. I obtained it last year through a point exchange at a convenience store in Hong Kong. The material is water-repellent, thin, and lightweight, making it convenient for outdoor activities and summer pool trips. It can easily fit A4 size items, so it's also recommended for lessons. Please refer to the photos for details. I have never used it and have stored it in a drawer. The outer box is crushed, but the contents are in good condition. If you are interested, please consider purchasing it.