Final answer:
The headrest of a facial chair should be covered with a clean cloth towel or plastic wrap.
Step-by-step explanation:
The headrest of a facial chair should be covered with a clean cloth towel or plastic wrap. Using a clean cloth towel or plastic wrap helps maintain hygiene and prevents the spread of bacteria and germs. Option 2: Used towel is not recommended as it may contain bacteria and could potentially transmit infections. Option 3: Synthetic material is not ideal as it may not provide sufficient protection or absorb sweat. Option 4: Newspaper is not appropriate as it does not offer proper cushioning or hygiene.