So as you can see, it doesn't require that much effort for a man to look effortlessly classic. Opt for a dark brown overcoat and a blue crew-neck sweater and be sure you'll look amazing. Go ahead and complement this ensemble with a pair of beige suede work boots for a carefree touch. Gentlemen who are curious how to sport modern off-duty style as you head into your 30s, this pairing should answer your question.