The one way protection valve in a CPR mask allows ventilation (breaths) to pass from the rescuer to the casualty without any physical contact between the two, minimising any risk of cross contamination and vastly improving the hygiene of mouth-to-mouth resuscitation.
The round tinted safety glasses are made of polycarbonate, which is lightweight, soft, drop-resistant, and impact-resistant. It can 100% UV400 so you will be protected by the lens.
