Breathe variety into your current casual fashion mix with a grey blazer and a grey crew-neck t-shirt. For a truly modern hi-low mix, add black and white canvas low top sneakers to this ensemble. This outfit illustrates that as a 40-year-old guy, you have a wide range of outfit options.
Why not dress in a grey blazer and a grey crew-neck t-shirt? As well as super comfortable, these pieces look amazing when teamed together. When in doubt as to what to wear on the shoe front, go with tan suede desert boots. This combination shows that figuring out how to dress stylishly as a mature gent is not particularly hard.
As you can see here, looking dapper doesn't take that much effort. Pair a grey blazer with a grey crew-neck t-shirt and you'll look awesome. For extra fashion points, complement your outfit with a pair of olive leather derby shoes. A look like this will help any gentleman in his forties outdo his peers.