The Penn QST 60 Felt 12 Pack of Training Balls are geared toward more advanced young players between ages 9 and 10 hitting on a 60 foot tennis court

Oscillation: Horizontal and Random

as the sponge

SnugFit™ Technology consists of unique power bands of Lycra® that hug your entire foot for maximum support

Wilson US Open Tournament Orange Ball 24 Cans COLLECTION-Activity-Platform Tennis The Penn QST 60 FeltLow compression Wilson US Open Tournament Orange felt tennis balls bounce 50% lower than standard balls. The lower compression makes them the perfect choice for training on 60 courts, driveways, and playgrounds. Recommended for ages 9 10. Adorned with a specific orange dot and number branded. Great for use with a 25 racquet.