A polo shirt is a type of knit shirt that has a collar, short sleeves and usually comes in different colors. It was originally designed for playing the sport of polo but now it's popular as a casual wear item for both men and women. The fabric used to make this style of shirt is typically made from cotton or a blend of cotton and polyester, which makes it comfortable and breathable in warm weather. Polo shirts are often embroidered with the logo of a brand or organization on the left chest area, making them popular as uniforms for businesses or schools.