Made of high-quality polyester fibre and rubber, our tennis training ball are super wear-resistance, pilling resistance and durable for you to use for a long time. Comes with a convenient reusable mesh bag for easy transport and storage. NOTE: our tennis ball not for official competitions or games.[Super Bounce]With a thick rubber shell, this training tennis balls maintain a perfect and balanced bounce. 8 pack tennis balls are ideal for teaching and practice on any surface available.[Perfect for Training]Suitable for daily pratice, traning or contest. Suitable for tennis beginner or tennis lovers. Come to play tennis with your beloved one and enjoy your pleasure time.[Fun & Interactive with Lovely Dogs]These tennis balls can be used as perfect dog toy to interact with your lovely dogs, improving their athletic ability and flexibility. Train your lovely pets in parks, grasses, yards, swimming pool and so on.