This casual combination of a white and black print crew-neck t-shirt and navy jeans is extremely easy to pull together without a second thought, helping you look amazing and prepared for anything without spending a ton of time combing through your wardrobe. Put a different spin on an otherwise mostly dressed-down outfit by rounding off with a pair of black leather chelsea boots. If you want people to see maturity in you as a 20-year-old guy, an ensemble like this is a solid option.