This off-duty combination of a navy long sleeve shirt and blue jeans can go in different directions according to the way it's styled. Puzzled as to how to complement your ensemble? Rock a pair of black leather chelsea boots to ramp up the classy factor. So if you're searching for an ensemble that's sharp but also feels totally spring-friendly, this just might be it. And if we're talking fashion tips for teenage boys, this combination looks great on most.