Official size and weight: Size and weight used in professional sports; ideal ball for ages 13 and up. Extended durability: The robust wrapped construction ensures that the ball maintains its optimal round shape from game to game. Ideal touch: The high-performance synthetic leather cover allows you to shape the ball to your liking with every contact. Pro performance indoors: Play like the professionals indoors with brand new professional designs and higher quality materials. Pro Tour Volleyball: Play like the pros with the Wilson Pro Tour indoor volleyball. The Pro Tour is designed for long-lasting use and features a synthetic leather cover, a wrapped structure, and V-Tec seams. This indoor volleyball is a model with official size and weight specifications.