A classic turtleneck is a wardrobe staple and a fashion constant that can always be relied upon. Whether you choose to dress it up with tailored trousers or under a suit, or down with a pair of jeans, a turtleneck can be made to fit almost any occasion. Look to Armani and Rick Owens upon for timeless options in monochrome shades, or go for a more daring look and try KENZO or Christopher Kane's collection for chunky knits in vibrant shades and contrasting colours. Whatever your style, there's a turtleneck to match.