Pair a charcoal turtleneck with black jeans for an easy-to-style ensemble. Ramp up the cool of your outfit with brown leather casual boots. During the colder months, when functionality is everything, it can be easy to surrender to a less-than-stylish outfit in the name of practicality. But this outfit is a bright example that you can actually stay cozy and remain stylish during the colder months. Ideal if you're scouting for some seriously inspiring style for 20-something gents.