For an effortlessly sleek ensemble, try teaming a trenchcoat with a white crew-neck t-shirt — these pieces fit beautifully together. For something more on the off-duty end to finish your ensemble, introduce a pair of sandals to the equation. It's a viable choice when it comes to piecing together a cool ensemble for transitional weather. Perfect to show the world that even as a young adult you're confident enough to make your own fashion choices.