Prepare yourself for chilly winter days and nights by snuggling up in this season’s coziest design: the cocoon dress. Also known as a shift, trapeze, or smock, this silhouette has been around for decades. Notoriously difficult to pull off, the latest incarnations of this voluminous garment offer considerably more style than a sack, and are forgiving for all figures. Recently seen on the runways of designers like Stella McCartney, Moschino, and Chloé, the cocoon dress is a favourite of fashionistas around the world, who appreciate its clean, simple lines