A dark brown polo and black and white check chinos are both versatile menswear essentials that will integrate nicely within your daily casual repertoire. If you want to instantly step up this outfit with one piece, complete your look with a pair of black leather loafers. This ensemble is a foolproof option if you're searching for a great, summer-friendly ensemble. Certainly a never-failing option when it comes to fashion tips for 40-year-old guys.