7. When you are buying online this is easier, because you have ratings and comments on many stores out there. It is good to look at top rated soccer balls or best selling soccer balls. Another good source to do is by visiting soccer forums where people talk about different things and there can be also a board/post about soccer balls, what they think, their experience etc.
Latex bladders are one of the best materials when it comes to ball construction. However, with latex bladders, air won’t last as long as butyl bladders and will need more attention for proper inflation. Butyl-blend bladders hold in the air much better, but they are harder and less receptive in play. Mid-priced balls will usually have a mix of butyl and rubber. https://www.youtube.com/watch?v=c1SVcjYY6TE