The Slazenger Wimbledon are the highest standard tennis balls used and endorsed at Wimbledon. These ITF approved balls feature the Hydroguard technology that helps their cloth repel up to 70% more water when compared to conventional balls. The combination of premium woven cloth and the Ultra Vis dye and patented application process ensures excellent visibility for players and audiences and makes the balls simply perfect for the championship game. The Slazenger Wimbledon balls are supplied in a tube of 4.