This casual combination of a dark green crew-neck sweater and black chinos is very easy to throw together without a second thought, helping you look amazing and ready for anything without spending too much time searching through your wardrobe. To add some extra classiness to your outfit, add tobacco leather casual boots to the equation. This outfit is a wonderful option if you're figuring out a cool ensemble for unpredictable fall weather. An outfit completely worthy of a 20-year-old's semi-formal wardrobe.