This pairing of a field jacket and a brown blazer is undeniable proof that a simple look can still be really interesting. Puzzled as to how to finish off this ensemble? Round off with a pair of dark brown leather dress boots to class it up. This look is a good option if you're crafting a well-coordinated outfit for summer-to-fall weather. As a 30-year-old, you want to start dressing with more refinement. In this case, getups like this are perfect as inspiration.