Dapper up for the day in an overcoat and an olive long sleeve shirt. For a more polished finish, why not complement your ensemble with a pair of black suede chelsea boots? As you can see here, as a 30-year-old gentleman, you have a wide range of dressing options.
For a smart casual getup, wear an overcoat with an olive long sleeve shirt — these items work pretty good together. Throw tan suede desert boots into the mix to make a mostly dressed-up look feel suddenly fresh. If you're over 30, pay attention to getups like this to add more maturity to your personal style.
For a look that's pared-down but can be dressed up or down in a ton of different ways, marry an overcoat with an olive long sleeve shirt. A fail-safe option for 30-something gentlemen on the lookout for a more mature look.