If you were to track the data collected by the UK's Office for National Statistics, you'd notice that the flat cap is about to hit its peak - thanks largely to Messrs Idris Elba, David Beckham and Cillian Murphy. Borsalino's one has been made in Italy from linen woven with a classic herringbone pattern and lined with breathable cotton. The grosgrain browband ensures it fits comfortably.