For years, ill-fitting short sleeve button-down shirts conjured up images of nerdy guys like Dwight Schrute or Mormon missionaries. But they've been gathering steam with stylish gents for the past few years and now brands big and small are offering sharp takes on this warm weather staple. Cut from lightweight cottons with a more streamlined fit, they make for a nice alternative to your everyday polos and T-shirts. We've sorted through hundreds to bring you the best buys available right now.