Huge fan of Bend-It, I would not consider buying any other brand of ball. I have 4 or 5 different styles that have been used and abused during club training and off-season indoor games. It's fun watching another coach pick it out of a crowd of balls to check the brand. I've even had a pro player pick this ball out of a crowd to use in group training sessions (Go STL FC!!)
Why do I always have to pump up even expensive balls? Many balls use bladders made out of latex. Natural Latex Rubber bladders offer the softest feel and response, but do not provide the best air retention. Micro pores slowly let air escape. Balls with natural rubber bladders need to be re-inflated more often than balls with butyl bladders. Even after one or two days, the latex bladder will leak enough air so that you will have to inflate the ball back to recommended pressure. Some balls use carbon-latex bladders in which the carbon powder helps to close the micro pores. Soccer balls with carbon latex bladders usually increase air retention to approximately one week. Of course, check the ball for punctures that may cause the air to leak out.
These soccer balls are exact replicas of the finale game balls, right on down to the specific design details that can be found on the ball. If you’re looking for a durable, reliable ball that can help players replicated the feeling of playing the game at home, then the Top Training Series by Adidas is one of the best options to consider today. Each ball is guaranteed to pass FIFA tests for weight, circumference, rebound, and water absorption. It is the closest you can get in the entry-level categories for a soccer ball to the match ball experience.
The outside of the soccer ball is typically made from one of two materials: PVC or Polyurethane. PVC is much more affordable and durable, and these are typically seen in training soccer balls because training balls go through much more of a continuous beating. Polyurethane balls are usually even softer than PVC balls and its ability to go where you want it to go is much better than the PVC balls. As a result, these are typically higher-end balls. However, there are still various ways to construct them, and not all PVC or polyurethane balls are created the same. Glossy coatings, which are very popular in the public fields with the kids and adults alike, are also very useful because they help reduce scuffing and the intake of water.