The Dunlop Progress Squash Ball can be recognized by the red dot. This ball is ideal for recreational players. The Dunlop Progress Squash Ball is 6% bigger and bounces 20% more than the Dunlop Pro Squash Ball (double yellow dot). This gives you more time to play the ball and keep the ball alive. You can warm up the ball but it is not necessary. The Dunlop Progress Squash ball is packed individually in a cardboard box.