Penn Championship Extra Duty, High Altitude Tennis Balls (12 Cans, 36 Balls)

Product Description

• Used to play at high altitudes
• Only for play occasions above 4000′ elevation levels
• Approved by the USTA
• Pack includes 36 high-altitude tennis balls in 12 recyclable plastic cans
• Do not store over 120 degrees Fahrenheit
• Controlled fiber release for consistent nap
• Made from natural rubber for reduced shock
• Interlocked wool fiber for longer wear
• Designed for easier control in thin air
• Penn Championship is America’s number 1 selling tennis ball