Offering the same consistency and feel of the best-selling championship quality tennis balls, the Penn(R) Championship Pink Extra Duty Tennis Balls were designed to promote awareness of breast cancer and help provide funds to research a cure. Quality Construction, Enhanced Feel Controlled fiber release for consistent nap Natural rubber provides consistent feel and reduced shock Interlocked wool fiber for longer wear Join the Fight Penn(R) donates a portion of sales from each can of pink tennis balls to Breast Cancer Research Additional Details USTA and ITF approved Can includes 3 tennis balls