Training Aid: This tennis trainer features a durable ball attached to a rope, ideal for enhancing your training sessions. For optimal performance, replace the ball regularly to ensure continued effectiveness. Unique design: The ring-shaped groove in the center and the semi-circular groove on the top prevent tangling and knotting while securely holding the balls tennis balls and elastic rope. This thoughtful design makes storage and transportation easier. Durable Performance: Made from high-quality PE material, this tennis shoe features a thick rubber lining and elastic nylon rope for efficient rebound and exceptional durability, making it the perfect tool to improve your game. Durable and reliable: Made from premium PE material, this tennis trainer is equipped with a liner made of sturdy rubber and an elastic nylon rope to ensure consistent bounce and superior durability, making it a great choice for improving your skills. Versatile use: Perfect for improving your tennis skills, this trainer is ideal for a variety of environments including tennis courts, parks and courtyards. Take advantage of the opportunity to practice and improve your game in outdoor environments. Caution: Not suitable for children under 6 years old. To be used under adult supervision