PRO PENN MARATHON EXTRA DUTY

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).