A red and navy horizontal striped crew-neck t-shirt and charcoal sweatpants are a great pairing to keep in your off-duty rotation. A pair of white leather low top sneakers immediately kicks up the wow factor of any ensemble. So so as you can see, it's a neat, not to mention season-appropriate, outfit to keep in your transeasonal rotation. This getup demonstrates that as a 30-something gentleman, you have a wide range of style options.