When it comes to timeless elegance, this pairing of a grey sweater vest and black chinos is the ultimate look. To introduce a bit of flair to this ensemble, add dark brown suede loafers to the equation. As you can see here, it's super easy to look awesome and stay toasty when chillier weather hits, thanks to this ensemble. As you're going from your 20s to your 30s, you want to start dressing maturely. In this case, combinations like this are a winning option.