Buy Ivory Cashmere Cardigan | WHISTLES from whistles.com. Cardigans are a wardrobe staple for every season, and this one makes for the perfect light layer. Fashioned entirely from cashmere, the design is relaxed and the silhouette boxy. Whether you style it over a dress, or a t-shirt and jeans, this cardigan will instil a sense of understated luxury to your looks. Ivory Cashmere Cardigan