EXCLUSIVE AT NET-A-PORTER.COM. Roland Mouret's 'Fenland' dress is a limited edition piece the label has made just for us, so snap it up fast. Made from sculpting royal-blue cady, this style has cape-effect sleeves that conceal the upper arms and a flattering off-the-shoulder neckline anchored by slim straps. The springy handle means you can move around freely without feeling restricted.