Make a yellow crew-neck t-shirt and jeans your outfit choice for a trendy and easy-going look. Dark brown leather casual boots will breathe a touch of sophistication into an otherwise straightforward ensemble. During the colder months, when functionality is prized, it can be easy to settle for a less-than-stylish ensemble in the name of functionality. But this ensemble is a clear example that you can actually stay warm and remain equally stylish during the colder months.