This combo of a double breasted blazer and dark green dress pants is a foolproof option when you need to look really polished. If you want to easily dress down this getup with shoes, complement your ensemble with a pair of low top sneakers. So if you're in search of an easy-to-transition look, this one fits the bill. Well into your 30s, you probably want to start dressing with more refinement. That's when combos like this are a winning option.