The game of soccer has evolved greatly over the years and the ball has evolved with it. In days past, defenses played with as many as six men back. Then things changed around the 1950s to allow when many teams played four forwards at one time! Now, we are in a period where we see (sometimes) one natural forward in a team. The changes that have happened in the game have oftentimes been a result of the changes to the soccer ball itself. Through its many changes, it has allowed teams to change strategies.
Size 5 is the official size for professional matches. Therefore, this ball is only available in this size. Do not use this soccer ball on concreted areas. Its unique rubber uses Puma Airlock Valve Technology (PAL) in order to facilitate proper airlock technology. This ball features Perimeter Balance Technology (PBT) which enables it to maintain impressive flight characteristics. https://www.youtube.com/watch?v=j2Xn84L3Kcs