A waistcoat and a long sleeve shirt are a classy combo that every modern gent should have in his arsenal. Let your styling skills truly shine by finishing off this ensemble with brown leather loafers. So as you can see, it's super easy to look awesome and stay toasty when cooler weather comes, all thanks to looks like this one. An outfit like this will make you look a million times more stylish as a man in his 20s.