I received this as a continuation benefit for Kodomo Challenge English. The material is non-woven fabric, and it has a bottom board. I think it's probably not for sale. It's a new, unused, and unopened item, but since it's a product for children, please purchase it only if you understand that it is a used item. *The estimated shipping date is set to the maximum number of days just in case, but please feel free to consult if you have any requests. I can ship it as quickly as possible. #KodomoChallenge #Shimajiro #StorageCase