Why not wear a grey crew-neck sweater with a blue denim shirt? As well as very functional, both items look amazing when combined together. Does this outfit feel all-too-classic? Introduce black and white leather low top sneakers to switch things up. A wonderful example for any gent who's still working out how to dress as a 40-year-old guy.
One of the most popular ways for a man to style out a grey crew-neck sweater is to pair it with a blue denim shirt for an off-duty look. Finishing off with a pair of black leather derby shoes is the most effective way to add a little depth to your look. This outfit illustrates that cracking the fashion code as you age into your 40s is quite manageable.