Rock a dark green suit with a navy overcoat if you're aiming for a clean, sharp outfit. Don't know how to finish? Complete your ensemble with a pair of white canvas low top sneakers to switch things up. This getup is a savvy idea if you're looking for a knockout look that will take you from summer to fall. As you're transitioning from your 20s to your 30s, you want to start dressing more like a mature gentleman. In this case, combinations like this are perfect as inspo.