If you're facing a sartorial situation where comfort is critical, team a white and navy short sleeve shirt with khaki chinos. Look at how nice this look is complemented with low top sneakers. Ideal if you're looking for some incredibly inspiring style for 40-something gentlemen.
For an ensemble that's super straightforward but can be manipulated in many different ways, pair a white and navy short sleeve shirt with beige leopard chinos. A pair of low top sneakers integrates seamlessly within plenty of combos. Think it's hard for mature guys to master modern off-duty dressing? This combination is hard proof of otherwise.