For an ensemble that's worthy of a modern fashion-forward gentleman and effortlessly sleek, go for a brown sweater vest and brown chinos. A pair of dark purple leather loafers easily turns up the wow factor of any look. Keep this combination in your front hall closet when warmer days are here, and we guarantee you'll save a lot of time crafting an ensemble on more than one occasion. As a man in his 30s, you probably want to start dressing more maturely. That's when ensembles like this become very relevant.