Mizuno reveals new airtime concept with jpx ball with dimple cluster design for delayed descent dimple cluster design micro dimples activate in descent added airtime through aerodynamic design 3 piece construction soft responsive playabilitythe lsquodimple clusterrsquo design of the new jpx is a result of a 3 year study into the descent phase of ball flightin tandem with the fukuoka institute of technology mizunorsquos ball engineers found that by focusing on dimple performance in t