A mustard crew-neck t-shirt and black jeans are the kind of a fail-safe casual look that you so awfully need when you have no extra time. For something more on the classy side to finish off your look, add black leather chelsea boots to your ensemble. There are many ways to look good and survive the roasting hot weather, and that's one of them. This combo is a great inspiration to anyone who was hesitant about dressier style in his 20s.