Show that nobody does casual quite like you do by wearing a white vertical striped short sleeve shirt and white vertical striped chinos. To give your overall look a more laid-back touch, why not add a pair of black canvas sandals to this ensemble? This ensemble isn't a hard one to pull together and it's summer-appropriate, which is most important when it's blazing hot outside. If you frequently wonder how to dress as a 20-something gentleman, this outfit is a real life saver.