Over time, the baseball cap evolved into the modern-day version we know and love today. The design of the cap changed to include a cotton or wool fabric, and the adjustable strap was added to provide a better fit. The logos and designs on the front of the cap also became more prominent and are now an integral part of the baseball cap's appeal.
In the early 20th century, the baseball cap became a popular accessory for fans of the sport, and it wasn't long before the cap was adopted by other sports teams and organizations. The cap's popularity continued to grow, and by the mid-20th century, it had become a ubiquitous part of American fashion.