The Spalding 64-497 Zi/O Excel is a pure example of everything an indoor/outdoor basketball should be. The official ball of the NBA, it meets all stringent official size and weight specifications. The composite leather construction features the addition of a foam backing under the full ball pebbling to make handling even more precise. The deep channel design is 30 percent deeper for even better grip and dribble control. Additionally our Zi/O Excel ball has a composite leather cover along with deep channel grooves for better dribble control. This ball is designed for competitive indoor or outdoor play.