HEAD Pro Penn Marathon Extra Duty Tennis Balls (4 Pack)

Pro Penn Marathon is Penn's longest-lasting tennis ball, built around their Encore™ core technology — this is the extra duty version, in a four-pack.

Longevity is the entire pitch here. Most tennis balls go dead long before the felt wears out; Encore is Penn's answer to that, holding pressure and bounce for more play than a standard ball. The extra duty felt is the right choice for hard courts, where a regular duty ball fluffs up and slows down within a set or two.

Who it's for

• Hard-court players who get through a lot of balls
• Encore™ technology for longer-lasting bounce and pressure
• Extra duty felt — built to resist hard-court abrasion
• Four-pack, for regular play or club stock