For a smart look, marry an olive overcoat with a crew-neck t-shirt — these two pieces play really good together. You could perhaps get a little creative in the shoe department and complete your outfit with beige athletic shoes. Keep this getup in your front hall wardrobe come warmer days, and rest assured, you'll save a lot of time crafting what to wear on more than one occasion. Wondering how to nail casual looks as you make your way through your 20s? This combination is a practical illustration.