This laid-back pairing of a long sleeve shirt and blue chinos is very easy to pull together in seconds time, helping you look awesome and ready for anything without spending too much time going through your wardrobe. Complement this outfit with dark brown chelsea boots for an extra touch of sophistication. This ensemble is a surefire option if you're looking for a great, summer-friendly ensemble. So if you're looking for a nice and mature ensemble for a 20-year-old, this one fits the task well.