A white and black horizontal striped crew-neck t-shirt and black skinny jeans paired together are the ideal look for those dressers who love neat and relaxed styles. Get a bit experimental with shoes and complement this getup with a pair of black leather chelsea boots. Stick with this one if you're hunting for a solid summery outfit. If you want people to see maturity in you as a 20-something man, an outfit like this is a solid bet.