This bold casual pairing of a turtleneck and navy jeans is very easy to pull together without a second thought, helping you look awesome and ready for anything without spending too much time going through your wardrobe. Beige athletic shoes offer function, but with a fashion-forward effect. As you can see here, this combo is stylish and will keep you from freezing. All in all, a great demonstration of off-duty fashion for 20-year-old guys.