Dress in a dress shirt and khaki chinos to assemble a proper and elegant getup. If you want to easily dial down your ensemble with one single piece, why not make white leather low top sneakers your footwear choice? Naturally, it's easier to work through a boiling hot day in a easy and breezy outfit like this one. This combination should clear any doubts you had about wearing more elegant clothes as a 20-year-old man.