balls are essential in any sport that requires the game to be part of the use of a ball that can be recycled using paper, a plastic bag or a sock that is also used in games, game selections, football and in most sports that are not in water in socks is the accessory on the athletes' uniform. And in rhythmic gymnastics training, for example, athletes use pantyhose to improve body elasticity to perform well. Not just in ballet. Professional shin guard socks for athletes have a difference in their function and use for sports with balls or not.
But when at school or teaching sports, the professional does not have the use of a sock ball, it helped a lot of professionals to develop physical activity with the sock ball. Which you can fill with paper or plastic or the two socks can make the ball too.