Yonex Muscle Power 30 Orange Tennis Balls (60 Balls)The Yonex Muscle Power 30 Orange Tennis Balls (60 Balls) are a specially designed stage 2 training ball ideal for junior and developing players who are progressing beyond entry level play. These balls travel approximately 50% slower than standard ITF approved tennis balls, giving beginners and intermediate players extra time to react, sustain rallies, and develop consistent technique on smaller padel or junior sized courts. Part of Yonexs progressive