A black cardigan and a white crew-neck t-shirt are among the key pieces in any guy's functional casual wardrobe. And if you want to effortlessly up the ante of your ensemble with one single item, why not complete this look with dark brown leather derby shoes? And if you're searching for a killer ensemble that transitions easily into spring, this one fits the task well. Ideal if you're looking for some amazingly inspiring laid-back style for 50-something gentlemen.