A navy blazer and black skinny jeans are absolute menswear staples that will integrate well within your daily collection. A trendy pair of black leather chelsea boots is an effective way to give an extra touch of polish to this look. So as you can see, it's an on-trend, not to mention spring-friendly, combination to keep in your transitional arsenal. Those who are curious how to sport semi-casual style during your teen years, you have your answer.