Size 5 is the official size for professional matches. Therefore, this ball is only available in this size. Do not use this soccer ball on concreted areas. Its unique rubber uses Puma Airlock Valve Technology (PAL) in order to facilitate proper airlock technology. This ball features Perimeter Balance Technology (PBT) which enables it to maintain impressive flight characteristics. https://www.youtube.com/watch?v=j2Xn84L3Kcs
This is much like the kind of balls that I often buy and play with.  This is a training ball, but don’t let that fool you into thinking that means it is low quality. It is machine stitched, meaning it is mass-produced and has a nylon interior, making the ball last a long time as you practice and do your daily drills.  It also has a butyl bladder and is polyurethane so that it will stay inflated longer.  It has a really catchy green and black design and I’m sure all the kids would absolutely love to have this ball (or two) for the great price!
Machine stitched paneling and the nylon wound carcass helps to mold the shape that is inflated to a perfect circle due to its butyl bladder, which maintains its structure at all times. Using an abrasion resistant TPU exterior, the ball retains its style no matter where it is being played with. The synthetic panels are strong yet comfortable on the side of feet making it a terrific ball to practice skill-building.
Elements of the football that today are tested are the deformation of the football when it is kicked or when the ball hits a surface. Two styles of footballs have been tested by the Sports Technology Research Group of Wolfson School of Mechanical and Manufacturing Engineering in Loughborough University; these two models are called the Basic FE model and the Developed FE model of the football. The basic model considered the ball as being a spherical shell with isotropic material properties. The developed model also utilised isotropic material properties but included an additional stiffer stitching seam region.
That Mikasa ranks #2 on the list comes as no surprise to me as I have had great experiences with Mikasa.  This is a great mid-range soccer ball that falls into the match ball category.  Many users have claimed that they have been able to play with these balls for a couple of seasons!  That’s unheard of for most soccer balls because the stitching begins to come off.  This is a FIFA Approved Professional ball, meaning that it is up to the standards of professional players.  This is rare to see an approved ball for this price.  This is a great mid-range ball to have.
It came in a large box to accommodate the ball packaging. It comes semi deflated, so it needed some pumping before throwing it out to the kids to test out for the day. They loved the feel and control. Now, I think some was in their heads from knowing it was an actual ball the tis used for the pros, the text of the outside and the material did seem to give them better control over a $30 ball
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
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