Hardness: The palm part of the volleyball strap is made of polypropylene and the elastic band is made of rubber. It is flexible and can be used for a long time. Correct gesture: When practicing finger crossing, a volleyball is a device that helps athletes avoid contact between their palms and the ball, which can bring you effective training results. ADJUSTABLE BAND: This volleyball has a very wrap-around elastic band that can adapt to different hand sizes. It fits your palm well but does not feel tight. EASY TO CLEAN: The volleyball can be stored and taken anywhere. It can be worn on your palm or wrist, or you can put it on your sports water bottle. Wide range of uses: The volleyball has a highly elastic belt, suitable for players of different levels. If you are a beginner, it can help you achieve good training results in a short time.