This is a waterproof bag from the baseball equipment manufacturer HATAKEYAMA. It can be used to carry changes of clothes, towels, etc. for baseball practice and games. Due to its waterproof specifications, it can also be used for other sports and outdoor activities. Features: The roll-top opening and waterproof material (often tarpaulin) protect the contents from water. It also comes with a shoulder strap for convenient carrying. By connecting the plastic buckles on the sides, you can slightly change the size and appearance. It shows signs of use, but I think it can still be used. If you leave a comment, I will add photos of any detailed stains, etc. Please purchase if you can judge from the photos.