Twinning, Not Matching: The Olsens Hit New York Streets Prepared for Every Kind of September

Ashley and Mary-Kate Olsen surfaced on the streets of New York this week, a sighting rare enough on its own to stop traffic. What made it notable was the packing list: the sisters, joined by fellow designers, came armed with more than one outfit apiece, ready to swap layers as the September weather made up its mind. Each sister solved the same problem her own way, proof that even identical twins don't dress alike when the forecast won't commit. It is the kind of practical elegance that only reads as effortless from a distance.

With reporting from Vogue.