Caps, also known as baseball caps or baseball hats, are popular headwear that serve both a practical and fashionable purpose. They typically have a fixed crown and a curved peak that protects against sunlight. Caps are often made from cotton, polyester or other materials and come in a variety of colors, patterns and styles. Originally popularized in sports, especially baseball, they are now a common accessory in everyday life and are worn by people of all ages and genders. Caps can also be decorated with various logos, graphics or lettering and often serve as an expression of personal style or affiliation with certain groups or interests.