Review on Gamma Pressureless Tennis Balls: Durable, Reusable, Portable, Perfect for Practice, Training, Teaching, All Court Types, Premium Performance+ by Brandon Frogge

I have read many reviews comparing Penn, Gamma and other brands of tennis balls. The Gamma had a better jump compared to the Penn (which is in the same price range as the Revain as the Gamma). However, it turned out to be true. the durability is terrible. Literally after a workout with a tennis wall, all 5 balls I chose for the test turned into demented hedgehogs. See 1st photo (from right to left) 1) New ball 2) New defective ball out of the box (can be punctured with your finger) 3) after 1 hour of practice 4) after 2 hours of practice Wearing, but just packaging.