EXCLUSIVE AT NET-A-PORTER.COM. RIXO co-founders Henrietta Rix and Orlagh McCloskey have designed the perfect party dress just for us - meet 'Rose'. Inspired by vintage silhouettes and prints, it's made from lightweight silk emblazoned with zebra stripes. It's ruched across the stomach for a flattering effect, and the front split is traced with a waterfall ruffle. Underpin the open back with a great self-adhesive bra.