This pairing of a white and navy polo and dress pants is a must-try casually classic look for any modern guy. Add black suede loafers to the mix for an instant style fix. Keep this getup in your head come warmer weather, and rest assured, you'll save time brainstorming for what to wear on more than one occasion. This combination illustrates that looking fashionable as a 30-something Millennial guy is not that daunting a task.