The Significant Other Annabel Dress is crafted from satin, featuring a high neckline, soft gathers throughout the bodice, and an open back with an adjustable sash. The Significant Other Annabel Dress is crafted from satin, featuring a high neckline, soft gathers throughout the bodice, and an open back with an adjustable sash. Founded in Australia, Significant Other was created as a beach-to-bar brand for the laidback, fun-loving, and always on-trend modern woman.