A smart casual pairing of a dark green overcoat and a dark green crew-neck sweater can keep its relevance in many occasions. To give your overall outfit a more polished touch, why not introduce olive suede derby shoes to the equation? This look is a vivid example that fashion doesn't have to take a back seat in the colder months. So if you're searching for dressing tips for 50-year-old guys, this combo is an amazing example.