Combining a tan waistcoat and a navy overcoat is a fail-safe way to inject class into your styling collection. You can get a little creative on the shoe front and tone down this ensemble by rocking a pair of dark brown leather loafers. This combo is equally neat and practical. Now we're talking! As a 30-year-old man, you want to start dressing more maturely. That's when inspiration like this is very useful.