A crew-neck t-shirt and dark brown chinos are great menswear must-haves to have in the off-duty part of your wardrobe. Complement this ensemble with a pair of white and green low top sneakers et voila, the outfit is complete. When it comes to dressing for unpredictable fall weather, nothing beats a knockout combo that can take you from season to season. A practical illustration for anyone who wonders how to dress as a teenager.