Dress in a three piece suit and a white and black dress shirt and you will definitely make women swoon. Add a pair of black leather casual boots to the mix to loosen things up. During winter, when warmth is a must, it can be easy to surrender to a less-than-stylish ensemble in the name of convenience. However, this ensemble is a clear example that you can actually stay snug and remain equally stylish during winter. As you can see here, as a 20-year-old, you have a vast array of style options.