Try teaming a white short sleeve shirt with khaki cargo pants to create an interesting and current off-duty ensemble. Our favorite of a countless number of ways to finish off this outfit is a pair of beige athletic shoes. So if it's a warm summer day and you want to look seriously stylish without exerting much effort, this outfit will do the job in no time. Laid-back getups for stylish 30-year-old guys aren't actually that hard, as you see here.