Pairing a brown long sleeve shirt with olive chinos is a good idea for an off-duty outfit. If in doubt about what to wear in the footwear department, add black suede desert boots to the equation. During the winter months, when comfort is crucial, it can be easy to settle for a less-than-stylish outfit. However, this outfit is hard proof that you can actually stay comfortable and remain equally stylish in the winter months. Perfect if you're searching for some seriously inspiring casual style for gents in their 30s.