Rock a white shirt jacket with beige chinos to put together a casually neat and modern-looking outfit. You could perhaps get a little creative with footwear and dress down this outfit by finishing with a pair of espadrilles. Keep this ensemble ready to go come warmer days, and we promise you'll save time getting ready on more than one occasion. So if you're searching for dressing tips for gentlemen in their 40s, this ensemble is a good example.