This is an arena swim bag. It can hold a full set of items, such as a bath towel. It's lightweight, soft, and I think it's durable. I hardly used it, and it's been stored for about 10 years. It's vintage. It cost 5000 yen. However, there are cat teeth marks on the upper corner. I was thinking of selling it for 3000 yen if it didn't have the damage. The design might be novel. It's about 14cm wide, 16cm high, and 32cm long. Please consider it.