For an outfit that's classy and wow-worthy, choose a navy suit and a yellow horizontal striped polo neck sweater. When not sure as to what to wear when it comes to footwear, stick to brown leather tassel loafers. As you can see here, it's extremely easy to look awesome and stay warm come fall, thanks to this getup. If you want to portray maturity and elegance as a 20-year-old man, an outfit like this is a fail-safe option.