Before the competition, the divers polished their diving masks until the lenses were crystal clear.

The exhibit featured several death masks arranged under glass, their silent faces preserving history more vividly than any portrait.

Flight attendants reminded passengers to secure their oxygen masks before assisting others.

During the laboratory emergency drill, all students were instructed to put on their gas masks before entering the contamination zone.

She found an old Jason mask in the attic and shivered at how real it looked.

The collector gently polished the rare mask shell before placing it in the display case.

She studied the death mask carefully, trying to imagine the expression he had in life.

She hurriedly put on a gas mask before entering the contaminated warehouse.

During the emergency drill, the instructor showed us how to secure the oxygen mask quickly and comfortably.

Please wear a face mask when you visit the hospital.