■ Memory foam practice ball for free batting and is the same construction as official game balls. ■ The leather is made of natural cowhide leather. ■Although it is made of natural cowhide leather for practice, there may be slight yellowing or small scratches. This is not an issue with use. Because it is a ball that will get dirty with just one use. It is better to buy a little better and cheaper. ■ Official size support/circumference 9" - 9.25" Weight: 5 oz - 5.25 oz ■ Memory Foam practice ball ■ New standard used for all kinds of professionals and amateur baseballs. ■ Hard memory foam exercise ball is highly popular in many high school baseball centers and team people in working people. Made of natural cowhide leather, this exercise ball is durable, and is ideal for free batting at the same time for quality. Satisfaction Guaranteed. ■ It has been used as practice balls for various league such as working people, college students, high school students, boys, little senior, pony and young, fresh.