I purchased this at the Pokémon Center around June, about four years ago, during the rainy season. It's a water-type Pokémon item. I used it a few times, but I had other laundry bags, so I didn't really have anything to store in it at home. Eventually, I folded it up and stored it at home for several years. There are no noticeable stains, but please consider this a used item. The material is waterproof, and it can be folded flat. When unfolded, it's a self-supporting bag. According to the product information, the size is approximately 30 x 47 x 33cm in diameter. For reference, I've included a photo with a measuring tape.