Buy now and enjoy the best quality High performance Tennis balls at the best price at all RISCO KIDS outlets today! A tennis ball is a small hollow ball used in games of tennis and real tennis. Tennis balls are filled with air, fluorescent yellow and surfaced by a uniform felt-covered rubber compound. The Tennis ball felts comprise of wool, nylon, and cotton in a mixture surrounding of Long lasting durable rubber core edge. Whether you are an experienced competitive player, an advanced level exerciser or a beginner in need of balls that suit your level, these balls are a perfect choice for you and will help you play better whether it be for training or matches. Balls are a fundamental part of your tennis equipment and at RISCO KIDS we offer only the best option to ensure your game is always at its best.