This semi-casual combo of a dark green overcoat and a blazer takes on different nuances according to how it's styled. Why not complete your ensemble with a pair of dark brown suede desert boots for a more laid-back touch? In the colder months, when warmth is above all, it can be easy to surrender to a less-than-stylish outfit. However, this outfit is a bright example that you can actually stay comfortable and remain equally stylish in the colder months. Overall, a great choice if we're talking dressing ideas for guys in their 30s.