Combining a sweater vest and a white dress shirt will allow you to assert your styling prowess. Complete your look with a pair of tan leather loafers and off you go looking smashing. Come summertime you're looking for a look to keep you fresh and on-trend –– this look is just the one you need. As a 30-year-old, you want to start dressing more maturely. That's when inspiration like this comes in handy.