Polyester material. This size can be used as a shoe case or a small backpack. Please check the photos carefully before purchasing. Brand new, unused. Stored by a private individual. Please understand. Instant purchase is welcome. Tennis, soft tennis, badminton. *Red is also available. If you want multiple items, please contact me. *When packing, I will take the item out of the bag and ship only the product. Please understand. Shipped via Yu-Packet Post.