For an off-duty outfit with a city style finish, wear a grey crew-neck t-shirt with light blue ripped skinny jeans. To give your overall getup a more refined touch, complement this outfit with white and navy leather low top sneakers. You totally can keep your cool under the oppressive heat, and this ensemble is a shining example of just that Wondering how to perfect casual style as you head into your 30s? This pairing is a practical example.