For a casually cool look, try teaming a long sleeve shirt with a white and black crew-neck t-shirt — these pieces go really well together. And if you need to instantly step up this ensemble with a pair of shoes, why not add a pair of black leather chelsea boots to this look? Springtime is a wonderful time of year and it calls for neat looks just like this one. As you're moving through your teens, you probably want to start dressing more like a grown-up. In this case, looks like this are ideal as inspiration.