For a fail-safe casual option, you can rely on this combo of a light blue long sleeve shirt and grey plaid chinos. Beige suede desert boots pull the look together. So if you need outfit ideas on how to dress as you slip into your 40s, this outfit is a great example.
If you prefer casual style, why not rock a light blue long sleeve shirt with a light blue chambray long sleeve shirt? For maximum effect, complete your ensemble with beige suede desert boots. This combination shows that as a middle-aged gentleman, you have a wide range of style options.