1. Baseball players in the game because of space and time problems will be on the sun affect the line of sight, so the baseball cap has played a role in shading.
2. Baseball cap can restrain the players'hair and avoid mistakes caused by the long hair covering during the game.
3. Baseball players play in winter or colder seasons, baseball caps can play a role in ensuring head warmth.
4. Baseball caps can be used to prevent small items from falling into the hair, such as sand in baseball games.
5. With the development of baseball caps, the above four basic functional characteristics of baseball caps can not meet the needs of modern people. Baseball caps are becoming more and more fashionable and can be used as decorative articles.