Why not team a beige crew-neck sweater with a long sleeve shirt? As well as totally practical, both pieces look awesome when worn together. If in doubt as to the footwear, stick to a pair of dark brown leather casual boots. If you're wondering how you should dress as a 40-something gentleman, this combo is a good source of inspiration.
Fashionable and practical, this relaxed casual pairing of a beige crew-neck sweater and a long sleeve shirt provides with variety. And if you need to immediately level up this getup with one item, why not introduce a pair of dark brown suede chelsea boots to this ensemble? No doubt, a savvy option when it comes to style for 40-year-old guys.