This pairing of a beige trenchcoat and white linen chinos is a must-try casually sleek outfit for any man. Opt for brown suede loafers to take things up a notch. So if it's a boiling hot warm weather day and you want to look stylish without exerting much effort, this ensemble will do the job in no time flat. As a 30-something Millennial gent, you probably want to start dressing like a grown man. In this case, ensembles like this are a foolproof option.