Penn Marathon Tennis Balls

These balls are specifically engineered for hard court surfaces. While they will function on other surfaces, the extra-duty felt is optimized to withstand the abrasive nature of hard courts, so they may perform differently on clay.

Encore Technology is a core design that helps the ball retain its internal pressure for a longer period. This means the ball maintains its bounce and responsiveness through more sets compared to standard pressurized balls.

The Smart Optik felt is designed to be brighter and more vibrant than standard felt. This improved visibility makes it easier to track the ball's spin and trajectory, which is particularly helpful during fast-paced rallies.

A case of 72 is generally geared toward frequent players, coaches, or clubs who go through balls quickly. If you play once or twice a week, this volume might be excessive unless you are stocking up for the entire season.

Because these are pressurized balls, they will eventually lose pressure over time even when sealed. However, the Encore Technology is specifically designed to slow that process down, giving them a longer shelf life than standard pressurized options.