Wilson NBA Authentic Series Basketball - Indoor, Size 5 - 27.5" NBA OFFICIAL: Wilson is the official basketball of the NBA. This ball features official NBA branding coupled with the iconic Wilson script PURE FEEL MICROFIBER: Greater softness provided better grip, enhanced feel and ball control EVER BOUNCE CONSTURCTION: Consistent bounce every time AIR RETENTION: Inflation retention lining creats longer lasting air retention PERFORMANCE GAME BALL LINING: Specialized bladder construction provides the highest quality air retention NBA PRO SEAMS: New channel construction suited to player preference