I have used this item a few times and stored it at home. Returns are not accepted as there is no way to handle them with anonymous transactions. Please ask any questions you may have before purchasing. Please refrain from purchasing if you are overly concerned about details. We cannot be held responsible for any issues such as non-delivery after shipping. Packing materials will be recycled. Shipping will be via Yu-Packet Post. The exterior is nylon, and the interior is urethane. It can also be washed with water. This urethane is water-resistant, floats in water, and can be used for water-related leisure activities. Lightweight and durable materials are used for the exterior. Fine adjustments have been made to the materials of the top and rim, such as changing the thickness of the thread, to reduce weight. The urethane used for the core material has varying thicknesses in the top and rim to provide good balance and stable flight.