2014 Maxfli U/6x (12 Pack) Designed for players with faster than average swing speeds seeking straight flight and Tour performance 4 progressively dense mantle layers for straight flight, forgiveness, and high Moment of Inertia Tri-Di dimple technology optimizes aerodynamics for a consistent, penetrating ball flight New Tour-proven performance urethane cover for soft feel and exceptional short game control High-energy core provides maximum distance for golfers with faster than normal swing speeds