WILSON Tour Premier Tennis Ball Description:
Designed to the exact same specifications as the WILSON Australian Open, the Tour Premier balls feature yellow optivis felt for greater visibility.  Unique woven felt fibers offer maximum consistency and playability.  This ball is suitable for all court surfaces and can be used at both tournament and club level.
WILSON Tour Premier Tennis Ball Features:
Approved by ITF for competitive play.
Felt includes unique woven fibers for excellent consistency and playability.
All Court: Ideal performance on hard, abrasive courts.
Clay: Ideal performance on soft, clay/indoor surfaces.
Grass: Ideal performance on grass surfaces.