A polo shirt is a short-sleeved, collared pullover shirt that features a short button placket at the neckline.
Collar: A soft, structured collar that gives a neat look.
Placket: A small slit at the front with two or three buttons.
Fabric: Usually made of knitted cotton—often a textured weave called pique—or smooth jersey knit.
Sleeves: Typically short with ribbed cuffs.