For casual refinement with a masculine twist, dress in a blue shirt jacket and tobacco chinos. On the shoe front, go for something on the casual end of the spectrum by finishing off with a pair of white canvas low top sneakers. If you're not sure how to dress maturely, this ensemble is a great illustration.
This pairing of a blue shirt jacket and tobacco chinos is a surefire option when you need to look sharp but have no extra time to spare. With shoes, go for something on the smarter end of the spectrum and finish this look with black leather loafers. This getup demonstrates that in your thirties your outfit options are pretty much limitless.