Posture collar

Source: Wikipedia, the free encyclopedia.
A woman in a rubber posture collar

A posture collar is a rigid

posture, keeping the chin high and the neck extended. Posture collars typically flare widely at the front to reach from the chin
to the collarbone, preventing the wearer from hanging their head or looking downward.

Such collars are typically made from

D-rings for attaching other restraints.[2]

A special type of posture collar is a neck corset.

See also

References