Spalding NBA Zi/O Official Size Indoor/Outdoor Basketball Official-size basketball designed for indoor and outdoor useZi/O composite leather cover looks and feels genuineFull ball pebbling provides soft, tacky feelMeets the NBA's stringent ball specificationsMeasures 29.5 inches; official NBA ball weight Built using a Zi/O composite leather cover, the Spalding official-size NBA Zi/O basketball looks and feels like an official NBA ball. The ball also includes a foam-backed design with full ball pebbling, helping it stand up to the challenge of competitive play while maintaining a soft, tacky feel. Best of all, the ball is designed for use both indoor and outdoor use, so you can bring it to the YMCA or the playground. Designed to meet all of the NBA's stringent ball specifications,