If you don't take your personal style lightly, go for a casually smart look in a grey pea coat and a gilet. Our favorite of a ton of ways to finish off this ensemble is with a pair of black leather casual boots. If you're looking to stay snug this winter and look stylish while doing so, this getup is basically an essential. So if you're after outfit ideas on how to dress in your 20s, this pairing is a good example.