Men's designer knitwear is an autumn, winter essential so pick up something from the handpicked collection courtesy of farfetch.com. With luxury cashmere polo necks and chunky knits, we've found the best collection of men's designer knitwear on the web. Comfortable and cool, for something a little bit special: Marc Jacobs paisley print jumper is a must. farfetch.com also has a premium collection of men's cardigans from fashion's biggest names.