This combo of a white double breasted blazer and navy chinos is a foolproof option when you need to look stylish in a flash. When in doubt as to what to wear in the shoe department, introduce black leather brogues to the equation. So as you can see, this is a cool option for warm weather. As you pass the big 3-0, you probably want to start dressing like a grown-up. If that's the case, ensembles like this are a real lifesaver.