This semi-casual combination of a blue suit and a grey long sleeve t-shirt is very easy to throw together without a second thought, helping you look seriously stylish and prepared for anything without spending a ton of time searching through your closet. A pair of navy and white suede low top sneakers will effortlessly tone down an all-too-refined look. If you're a teen guy, take cues from looks like this to take a more adult direction in your personal style.