A piece that debuted at Paris Fashion Week, the Hourglass blazer – a signature silhouette for Haider Ackermann this season – captures the brand's sharp DNA. Made from white crêpe, the style features a satin shawl lapel, articulated shoulders, flap pockets, and seams that create a nipped-in waist. However, the defining feature is the cutaway detail at the single-breasted button front, which adds artful asymmetry. Emulate the SS18 runway look, wearing yours with other white suiting separates and black shoes.