The Tecnifibre Champion One are best suited to players searching for durable, quality tennis balls designed for regular training and competitive play. Offering a great feel and consistency, the balls can be used on all court surfaces and have been approved by the International Tennis Federation (ITF) and French Tennis Federation (FTF). They are produced from Enduro formula rubber and feature fluoro felt for high-visibility from all areas of the court. The balls are supplied in a 12-dozen pack.