This casual combo of a white linen long sleeve shirt and brown chinos is a real lifesaver when you need to look sharp but have no time. For a more relaxed vibe, why not complete this ensemble with white and navy leather low top sneakers? This combination isn't a hard one to nail and it's summer-appropriate, which is most important when it's extremely hot outside. When it comes to casual style for 50-something gents, this ensemble is ideal.