Summer is here and honestly, it's only going to get hotter outside. What's a stylish guy to do when he needs some relief from the sweltering heat but still wants to look put-together? Upgrade your off-duty wardrobe with a few short-sleeve popovers. The relaxed hybrid of a polo shirt and your standard button-down, there's a chest pocket to stow your shades and most can be worn untucked with shorts, jeans or a smart pair of chambray trousers. What's more, today's versions are cleverly fitted without being too tight and come in a range of cool colors and patterns (not to mention price points). From hand-dyed indigo hues and lively micro-prints to simple oxford interpretations, here are the best ones out there right now.