In 2010, the infamous Jabulani balls for the World Cup in South Africa transitioned from turbulent to laminar flow between 50 and 45 miles per hour, right at the speed for corner and free kicks. The transition between these different types of flow causes even more drag on the ball, which caused the Jabulani to wobble in the air and drop in ways that players weren’t expecting.
Adidas designs every World Cup ball, and on top of being a big seller for them, engineers at the company are constantly a little closer to the perfect ball, Goff says. The ideal soccer ball is a pimple-covered, perfect sphere, its surface just subtly textured enough to keep the airflow around the ball slightly turbulent. Unintuitive as this might sound, the ridges and pimples on the ball make it more aerodynamic, helping the ball to fly through the air more stably.
The ultimate determination is how a soccer ball feels and performs for you on contact. A good soccer ball will not only be tough enough to hold up to your fast and furious play, it will feature a soft casing for comfortable heading, and durable stitching (if stitched). It should handle well, and have good response. Most good soccer game balls feature a poly-urethane (PU) casing. Most leagues prefer 32-panel designs for its performance value. Also check for a warranty. Your new soccer ball should come with a manufacturer's warranty against defects and damage caused by normal play.
On the other hand, replicas (sometimes called training balls or gliders) are designed to be just like the official match balls but are much cheaper. Their panels are often stitched rather than thermally-bonded and are made of a different material. However, they’re not necessarily less durable than official match balls. So, they’re the recommended option for most players. https://www.youtube.com/watch?v=j2Xn84L3Kcs
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