Pro Penn Marathon
Pro Penn Marathon is Penn’s longest lasting tennis ball featuring exclusive Encore™ Technology for a 22% longer lasting core and high tenacity LongPlay® Felt for extended play. Pro Penn Marathon is the #1 choice of the USPTA Teaching Pros because of its guaranteed longevity, durability and visibility. Pro Penn Marathon is available in Extra-Duty Felt (for hard courts), Regular-Duty Felt (for soft courts) and extra-duty high altitude (for higher altitudes). Penn’s Professional Balls are the most technologically advanced tennis balls providing players with top of the line core and felt technologies that allow the ball to play at its best for longer periods of time.