Why do some soccer balls get bigger over time?  Many soccer balls do tend to get larger over time. Especially lower quality balls! This is due to the pressure of the bladder against the linings and cover.  Over time the material and stitching may stretch out causing the ball to become larger. Also, soccer ball abuse may cause the stitching to loosen and the ball to expand.
Ok i have read some of the negative reviews and i am sure there is the occasional faulty ball or the person who thinks they are buying a "regular match soccer ball"... that is not what this ball is designed for. It is an "ultra-durable" and nearly indestructible soccer ball. I have been buying these for 4 years and i give them away especially in Nicaragua. I would venture to say these balls are not designed for normal use in the USA on a manicured field... the flight, the touch is a little different... but if you play on hard surfaces, rocky roads, near barbed wire fences, in environments such as Nicaragua and other countries this is the best ball you can buy. I took my first ones to Nicaragua and left them and one was played with nearly every day for three years by some kids in a local
In 1838, Charles Goodyear introduced vulcanized rubber, which dramatically improved the football.[5] Vulcanisation is the treatment of rubber to give it certain qualities such as strength, elasticity, and resistance to solvents. Vulcanisation of rubber also helps the football resist moderate heat and cold. Vulcanisation helped create inflatable bladders that pressurize the outer panel arrangement of the football. Charles Goodyear's innovation increased the bounce ability of the ball and made it easier to kick. Most balls of this time had tanned leather with eighteen sections stitched together. These were arranged in six panels of three strips each.[6][7]
Another type of soccer ball that some players may find to be useful is the indoor soccer ball. Indoor balls are designed to have less bounce and rebound to them, making it possible to control the ball on a tighter court or field. The cover of an indoor ball is also the strongest of any category, so it can withstand play on turn, hard court surfaces, and impacts with walls.
Still, despite how impressive the materials used for the soccer ball are, Adidas is not done providing one of the best products available. For instance, this ball uses thermal bonding instead of either hand or machine stitching. This has the advantage of allowing the ball to fly truer as well as resisting water better. On top of that, some sellers even have balls with embedded NFC chips, which provide all kinds of valuable feedback information on you play.
Soccer balls also have various sizes that you can choose from, and what is best for you will depend on how old you currently are. Soccer balls come in different constructions in the inner bladder and the lining, which can contribute to their responsiveness on the field. Panels on a soccer ball are also important since they can influence a ball’s flight characteristics, and the control a player will have on the field. Like any other sporting equipment, picking the right soccer ball, if you are very meticulous, is something that will need some key points to consider.
In early FIFA World Cups, match balls were mostly provided by the hosts from local suppliers. Records indicate a variety of models being used within individual tournaments and even, on some occasions, individual games. Over time, FIFA took more control over the choice of ball used. Since 1970 Adidas have supplied official match balls for every tournament.[19]
What are the different types of soccer balls? Should I buy an expensive one, a middle priced one or a cheap one? What kind of balls are adequate for my needs?  Most soccer balls can be divided into three different categories, professional match balls, match balls, and practice balls.  The type you need of course depends on how and where you want to use the soccer ball. For more information on types of soccer balls, click here. 
Adidas says its design was motivated by Russia's urban landscapes. It uses textured graphics and a metallic sheen to bring a modern look to the classic design. The ball is made of six panels of thermally bonded TPU and about 15% silicone. The materials allow for better trajectory, accuracy, responsiveness, and low water absorption. It also feels well-padded and slightly lighter than previous match balls.
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