A zip sweater and black chinos are the kind of a tested casual combo that you so awfully need when you have no time to dress up. Add a pair of grey low top sneakers to avoid looking too formal. All in all, a great example of casual style for gents over 30.
For an outfit that's pared-down but can be flaunted in a ton of different ways, consider wearing a zip sweater and navy jeans. If you're not sure how to finish off, throw a pair of grey low top sneakers into the mix. This getup shows how to keep killing it in the casual style department as a 30-something guy.