Pro Penn Marathon Extra Duty Butterfly Has all the features a

Has all the features a true touring tire should have at a top quality level - a tread for all road surfaces

Penn۪s Professional tennis balls are the most technologically advanced tennis ball providing player with top of the line core and felt technologies that allow the ball to play at its best for longer periods of time

RPM Blast is a premium shaped polyester string that can be devastating to your opponents

We recommend you protect the rubber surface with rubber protective film after a match or practice

FL Handle Size: 100x25mm

Pro Penn Marathon Extra Duty Butterfly Has all the features aPro Penn Marathon is Penns 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 official ball of PTR 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). Penns