Looking good in a rollneck is easier than you think. It's a versatile piece of kit and a fine-gauge style can be layered under most outfits to look instantly more suave (think Steve McQueen in Bullitt and Daniel Craig in Spectre). Buy it from a specialist knitwear brand to avoid it stretching out of shape after a few wears - baggy is not good here - and it will see you through countless winters. We picked this beautiful version by John Smedley.