I bought these balls as a training ball to upgrade from Gambler 3*. I was very disappointed. the balls lack durability and from training 2 hours a day for 5 days a week 1 Gambler would last a month. I broke 2 Adidas balls in a week. Nothing has changed and our game play resumed as normal with Gambler balls. For the price 3 for $6 I would look elsewhere.