This combination of a navy blazer and a cardigan looks amazing, but it's super easy to replicate too. Choose a pair of dark brown leather casual boots and you're all done and looking awesome. In the colder months, when warmth is the priority, it can be easy to settle for a less-than-stylish getup. However, this getup is a bright example that you can actually stay comfy and remain stylish during the colder months. All in all, a wonderful choice if we're talking fashion for 30-something gents.