Flat cap, scaly cap, ivy cap, paddy cap, driving cap or newsboy cap (similar in style) or whatever you want to call, it is a rounded cap with a small stiff brim in front, originating in Great Britain and Ireland.
It has been around for a very long time and recently has returned to the male fashion scene.
Wool, tweed and cotton are the most commonly used materials for this fascinating hat not only for those who love vintage.
