A red baseball cap
The baseball hat is one of the most commonly worn hats in the world. It has an object on the front that's long and rigid and gives protection from the sun. They also usaully have a strap on the back with which you can adjust the tightness. Baseball caps were orignally made for baseball players to keep the sun out of their eyes but then spread to public use as they grew more popular. Eventually, people thought that wearing a baseball cap sideways or backwards was cool.