You'll be surprised at how easy it is for any man to get dressed like this. Just a white long sleeve shirt paired with khaki chinos. With shoes, you can follow the casual route with white and black canvas low top sneakers. This one is a modern yet age-appropriate combo for a 40-year-old guy.
Go for a white long sleeve shirt and teal corduroy chinos for a comfortable menswear style that's also pieced together nicely. Feeling transgressive? Shake up this outfit by sporting a pair of white and black canvas low top sneakers. This pairing illustrates that as a man over 40, you have a wide range of sartorial options.