It has a drawstring waist and this cotton fabric with a very slight stretch has a slight texture to it (brushed) and also a self stripe, elevating it from the everyday.
Perfect with a trainer and (IMO) with the aequamente gingham jacket and white shirt as worn by Daisy in the photos. But very easy to dress up, maybe try the metal applique Vanille jacket, with sheer tights and a heel? Awesome for a posh event.