What Is a Basketball Made Out Of?

By Staff WriterLast Updated Mar 26, 2020 10:27:41 AM ET
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ROBYN BECK/AFP/Getty Images

NBA balls are made of a leather exterior housing a butyl rubber bladder, which holds the air and creates enough pressure to properly bounce the basketball, and a carcass made of nylon and polyester. There are not any official specifications as to what basketballs should be made of.

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Even though there are no specific regulations, the NBA determines that a ball should be 29.5 to 29.875 inches in circumference. In 2006, Spalding, the brand that produces basketballs for official use, introduced a new ball made out of a microfiber composite, which was discontinued due to complaints from players.