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.
This is the perfect ball for young children to practice drills before any competitive soccer game. Besides, if you love anything “USA,” you’ll surely want to buy this colorful and shiny ball by Vizari. It has a pocket-friendly price tag, and you’ll truly feel your money’s worth when you buy it. It comes deflated and sells in three different sizes. The ball is pretty durable and can be used on most surfaces to practice drills.
The bladder, or the inside, of the soccer ball, is also very important to talk about.  There are typically only two choices that they are made out of butyl and latex.  The higher-end balls usually are latex while butyl is typically meant for training balls.  However, butyl is much better at keeping the air and shape of the ball for longer periods!   
Due to it being significantly softer than the other types of rubbers used for soccer ball bladders, latex is generally seen as the premier material. Though, this same perception may not hold as true for practice balls or even game balls at lower levels of competition. This is because latex bladders retain air worse than all of the other soccer ball bladder materials and will need to be re-inflated more often.
Whereas plenty of manufacturers that we reviewed opted to go with a soccer ball that was more durable than responsive, Mikasa takes the opposite approach and focuses primarily on the touch that their ball can provide. This is most apparent in the soccer ball’s choice of casing material. The synthetic leather casing of the Mikasa is by far the softest and naturally responsive-without the inclusion of texture-out of any other soccer ball we reviewed. https://www.youtube.com/watch?v=3OKagE2ZIRA