• Extra-duty felt is ideal for hard court play
• Natural rubber offers a consistent feel and reduced shock
• Interlocked wool fiber for longer wear; deep elastic seams prevent cracking
• USTA/ITF approved for competitive play; official ball of USTA League Tennis
Extra-duty felt. Controlled fiber release for consistant nap. High elastic seams for reduced cracking. Interlock wool fiber for longer wear. Natural rubber for consistent feel and reduced shock. Optic yellow. USTA approved. 3 balls per can.