When it comes to effortless sophistication, this combo of a navy sweater vest and white jeans never disappoints. On the shoe front, go for something on the smarter end of the spectrum and complete this outfit with a pair of navy leather loafers. And if you're looking for a neat outfit that will take you from winter to spring, this one fits the bill. Perfect if you're in search of some seriously inspiring style for 30-year-old gentlemen.