The exclusive Micro Cell cover on the Beach Pro ball is hand-stitched for long life. Its butyl bladder gives it true bounce and flight. International outdoor, 18-wide panel design. Specs: Official size and weight, hand-stitched. Whether on the beach or in the gym, Mikasa Sports USA volleyballs raise the bar and electrify the game with their technologically superior craftsmanship. The only volleyballs good enough to be the official game balls of all FIVB international matches including all the Olympic Games since 1968. No matter what level of game you are playing, this volleyball will upgrade it. The official tournament quality ball is guaranteed for two years of serious fun.