Hat brim
The hat brim is the part of the hat that protrudes sideways from the head and attaches to the lower edge of the hat crown. Hat brims run completely around the crown part of the hat and can be of different widths.
The brim serves as a privacy screen, sun protection and protects against precipitation . The wider the brim, the greater the protective function , but the easier it is for the hat to fly away due to the larger exposure surface for wind . The brim has always been used for decoration, especially on the very wide women's hats.
If brim-like components are only attached to parts of a headgear or are not present, it is a hat . One then speaks of an umbrella (for the eye area, sometimes also for the neck area) and of ear flaps.
In forensic medicine there is the so-called hat brim rule . This is used to assign an injury to an accident or to a third party impact.