Stella McCartney's buttoned-back sweater dress is key to stylish city dressing. Slip on with studded heels to emulate the label's contemporary-chic aesthetic. Stella McCartney sweater dress: light-gray wool, fine-knit, round neck, cropped sleeves, ribbed trims, distressed finish. Button fastenings at back. 100% wool. Dry clean. Designer color: Zinc.