Try teaming a navy blazer with a white crew-neck t-shirt to achieve an interesting and modern-looking ensemble. For a smarter spin, introduce a pair of black leather loafers to the mix. As you can see here, dressing maturely doesn't mean dressing old.
Try teaming a navy blazer with a white crew-neck t-shirt for a sleek refined ensemble. Balance your look with a smarter kind of footwear, like this pair of navy suede double monks. This combo illustrates that as a 40-year-old guy, you have a wide range of dressing options.