headgear

Short definition from Wiktionary

Noun

1. 1
   Anything worn on the head, such as a hat, hood, helmet, etc.
2. 2
   The harness that fits on a horse's head.
3. 3
   The lifting gear at the head of a mine or deep well.
4. 4
   The rigging on the foresail.
5. 5
   A type of orthodontic appliance attached to dental braces that aids in correcting severe bite problems.