Wilson Nova Indoor Game Volleyball - Official Size, Red/White/Navy Genuine Leather: Genuine leather cover provides durability, touch, and control during the highest level of indoor competitions. Integrated Core System: The Integrated Core System creates cohesiveness between the bladder and reinforced fabric to provide strength and shape integrity that results in increased responsiveness and precision. Laminated: Construction built for indoor play. Aerodynamic Flight: 18-Panel design creates aerodynamic stability for a more expected ball flight. Official Size And Weight: The size & weight used at the pro level, ideal for ages 13 and up. NCAA Approved: Wilson sets the standard for the highest quality game balls, and this ball is approved for use in NCAA competition across the USA. Approved for Competitive Play: Wilson created the standard for game ball performance and this product is approved for competitive play at all levels including high school and youth.