Answer: respirator

AnswerCrossword Clue
RESPIRATORGauze mask.
RESPIRATORBiohazard protection
RESPIRATORBreathing aid
respiratorAn apparatus worn over the mouth and nose or the entire face to prevent the inhalation of dust, smoke, or other noxious substances
respiratoran appliance which provides artificial respiration
respiratorAn apparatus used to induce artificial respiration