°torus-shaped object of
density low enough to keep a person, which usually slips his head, shoulders, and arms through it,
afloat. Often coloured white and bright red to be seen from great distance and in
adverse weather or light conditions.
Designed to be thrown after a person that went
overboard; hence often found attached to
railings close to water, e.g. on a ship.So this product was designed to save lives.
synonyms:
life preserver, life ring