"one of Gerald's grey fedoras"
Grey fedora
Public DomainGrey fedora - Credit: Baron Delvine

A fedora is a soft felt hat, usually worn by men. It has a wide brim which curls slightly upwards, and a lengthwise crease in the crown.

Fedoras became fashionable towards the end of the 19th century, and remained so until the 1950s when their popularity declined. However the decline was short-lived and fedoras have been back in fashion since the mid-1970s.