Kate debuted this breezy cover-up in Mustique in 2015. The piece is described by the designer: "Featuring a bold pattern of seashell –skeletons”, the beautifully tailored, above the knee shirtdress provides easy, but elegant fashion with a button-up front, a v-neck opening, mandarin collar and 3/4 length slim-fit sleeves with a narrow cuff." 100% silk crepe de chine. Retail: £302. Sale Retail: £108.