For a cool and casual outfit, opt for a mustard crew-neck t-shirt and orange sports shorts — these two pieces play beautifully together. For something more on the smart side to round off your ensemble, complement your look with white leather low top sneakers. This outfit is also ideal if you're scouting for summertime wear to get through a slow day. Wondering how to perfect casual dressing as you head into your 30s? This pairing is a practical illustration.