Retire your worn-out T-shirt and follow suit with the fashion crowd’s latest go-to top: the polo shirt. Shown on prominent S/S 15 runways like Chanel, Balenciaga, and Proenza Schouler, this preppy staple has undergone a noticeable makeover. Not sure how to make it look cool? Scroll down for nine examples, and if you need to restock, be sure to shop our favorites at the end!