Combining a denim shirt with black jeans is a great idea for a casual but stylish ensemble. If you're puzzled as to how to finish, a pair of white and navy low top sneakers is a safe option. As you can see here, this combo is a really great option, especially for awkward fall weather, when the temperature is falling. Think it's hard for guys in their 40s to perfect edgy off-duty dressing? This pairing will prove you otherwise.