Consider wearing a blue waistcoat and a white dress shirt for incredibly smart attire. To give your overall ensemble a more casual touch, introduce a pair of brown leather tassel loafers to your outfit. So if it's a baking hot hot weather day and you want to look stylish without putting in too much work, this getup will do the job in no time flat. And if we're talking style for 20-year-olds, this outfit is perfect.