For an ensemble that's nothing less than camera-worthy, opt for an olive waistcoat and a dress shirt. For something more on the off-duty end to complement your ensemble, complement this getup with a pair of dark brown leather casual boots. As you can see, this combo proves that good style and dressing warmly for the colder months are not mutually exclusive. Rock this ensemble to pull together a more conservative look as a 30-year-old guy.