The Official Ball of the US Open since 1978.
Features:
- USTA and ITF approved for competitive play
- Made with premium tex/tech industries felt
- Extra Duty: Optimal performance and durability on hard courts
- High Altitute: High altitude core for best performanceon courts above 3000ft
- Regular Duty: Optimal performance and durability on clay/indoor courts
- Grass Court: Optimal performance and playability on grass court surfaces