An olive parka and khaki corduroy chinos are among those super versatile menswear staples that can modernize your closet. Complement this look with dark brown leather casual boots to avoid looking too casual. In the winter months, when warmth is a must, it can be easy to surrender to a less-than-stylish look. But this look is a good illustration that you can actually stay warm and remain stylish in the winter months. And if we're talking casual fashion for 20-something guys, this outfit looks great on most men.