This Wilson AVP OPTX official size grass game volleyballball features a hand-crafted construction for a consistent shape and feel, ensuring peak performance every time you play. Equipped with VST (visual spin technology), this official size grass volleyball features strategic color variance and a vibrant palette, making spin detection and ball tracking effortless. The phosphorescent micro fiber material is specially designed for optimal color visualization during grass events, making it stand out on the field. The sewn ball cover construction adds to its durability and reliability. As the official volleyball of AVP grass tournaments, you can trust in this volleyball's quality and reliability.