A dark brown cardigan and a black crew-neck t-shirt are among those extremely versatile menswear must-haves that can upgrade your closet. Puzzled as to how to finish? Introduce a pair of black and white athletic shoes to your ensemble for a more laid-back spin. This one will play especially well come spring. Gents wondering how to pull off modern casual looks as you work your way through your teenage years, this combo should answer your question.