When the situation calls for a casually sleek outfit, you can easily rely on a blazer and a grey crew-neck t-shirt. Dial up your whole ensemble by finishing off with a pair of burgundy leather derby shoes. When it's one of those bleak fall afternoons, what better to cheer it up than a seriously stylish outfit like this one? If you've passed the big 3-0, take cues from combos like this to add more maturity to your style.