The pairing of a blue denim shirt and black chinos makes this a solid casual ensemble. Add an elegant twist to this look by wearing a pair of dark brown suede chelsea boots. During the colder months, when functionality is critical, it can be easy to surrender to a less-than-stylish outfit. However, this outfit is a bright example that you can actually stay warm and remain stylish during the colder months. All in all, a great example of smart casual fashion for 30-something men.