If it's ease and functionality that you're looking for in an ensemble, rock a long sleeve shirt with a navy crew-neck t-shirt. Red canvas low top sneakers are a smart option to finish this outfit. All in all, an ideal demonstration of smart casual fashion for 40-something guys.
If you're seeking to take your casual style to a new height, consider teaming a long sleeve shirt with a navy crew-neck t-shirt. Brown leather derby shoes are guaranteed to breathe an extra touch of refinement into this look. A practical illustration for any man who's not sure how to dress age-appropriately while still looking stylish.