In a time when the cardigan was labeled as a nerdy, archetypal piece of librarian gear, Kurt Cobain took a shine to it and the world began to see the humble button-up sweater in a new light. More recently, the cardigan has been given both the longline treatment and a luxury upgrade and, with style symbols such as A$AP Rocky and Young Thug evidently fans of the lightweight pullover, it's safe to say they're on the comeback.