For a casually cool getup, consider pairing a tan long sleeve shirt with skinny jeans — these items fit beautifully together. A trendy pair of dark brown leather chelsea boots is an effortless way to add a little kick to the outfit. If you're looking to keep warm this winter and look sharp while doing so, this getup is for you. When it comes to casual style tips for 20-something men, this outfit looks great on almost any man.