For a look that's truly GQ-worthy, pair a tan waistcoat with khaki dress pants. A pair of tan suede oxford shoes adds more character to an otherwise standard look. As you're moving through your late 20s, you want to start dressing in a dressier manner. In this case, outfits like this are a lifesaver.
Putting together a tan waistcoat and khaki dress pants is a surefire way to inject style into your wardrobe. Introduce a pair of brown leather brogues to the equation to make the outfit current. As you're progressing through your late 20s, you want to start dressing with more sophistication. That's when ensembles like this are a fail-safe option.