Ivy style is enjoying something of a revival. But unlike its close aesthetic cousin, prep – which famously has a handbook – there’s something more arcane about the Ivy League look. The latter was incepted at elite American colleges in the early 20th century. And much like the dining clubs and secret societies that proliferated at the same intuitions, Ivy style became a fraternity unto itself, with membership communicated through subtle sartorial signals. For instance, a natural-shouldered blazer with a three-roll-two button stance, an Oxford-cloth shirt with a perfectly frayed collar or a necktie that quietly communicates insider status.