A polo shirt is a type of casual shirt characterized by a collar, a placket with a few buttons, and short sleeves. It is typically made from cotton or a cotton blend, providing comfort and breathability. Polo shirts are popular for both casual and semi-formal occasions, making them a versatile addition to any wardrobe. Originally designed for tennis and polo players in the early 20th century, these shirts have since become a staple in everyday fashion. They are available in various colors and patterns, allowing for personal expression while maintaining a polished look.