A three piece suit and a white dress shirt are absolute wardrobe heroes if you're crafting a smart wardrobe that holds to the highest sartorial standards. Our favorite of a great number of ways to finish this outfit is burgundy oxford shoes. Stick with this one if you're looking for a killer summery outfit. So if you're on the hunt for a good-looking and mature ensemble for a 20-year-old guy, this one is great.