Buy Black Flare Knit Dress | WHISTLES from whistles.com. Incorporate knits into your spring-summer wardrobe, starting with this textured dress. An easy and comfortable choice for your special occasions, it boasts a pullover design, a keyhole cut-out detail at the back, and a flattering fit and flare shape. Add a pair of leather mules and add your favourite jewellery for the utmost elegance. Black Flare Knit Dress