If you're looking for a casual yet sharp look, consider pairing a black henley shirt with white jeans. Complete this getup with low top sneakers and ta-da: the getup is complete. Guys who are curious how to sport modern off-duty style well into your 30s, you have your answer.
Make a black henley shirt and a brown suit your outfit choice and you'll achieve a sleek and classy ensemble. Finish off with low top sneakers to add a little kick to the look. As a 30-something man, you probably want to start dressing more maturely. If that's the case, getups like this are ideal as inspiration.