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 men and women and are often worn in casual settings, sports, or as part of uniforms. The design of the polo shirt originated in the sport of polo, where players needed a comfortable yet stylish garment. Over time, it has become a staple in many wardrobes, often associated with brands like Lacoste and Ralph Lauren, which helped popularize the style.