Arena waterproof pouch. Usage history unknown. I believe it's unused or used a few times. It looks clean without any stains or damage, so I think it's still usable. Please refrain from purchasing if you are looking for a perfect item. It uses a material with excellent waterproof and water-repellent properties. It's useful for organizing wet swimwear, rain gear, and small items you don't want to get wet. It's lightweight and compact, making it convenient to carry. It's useful not only for pools but also for various scenes such as travel and outdoor activities.