DUAL EXHALATION VALVE VENTILATION SYSTEM
The Urban Air Mask 2.0 is designed with two exhalation valves acting as a ventilation system, making the air pollution mask comfortable to wear. When exhaling, the two valves allow warm, moist and carbon dioxide filled air to be ventilated out of the space between the face and the mask. This would otherwise build up inside the face mask, causing discomfort. When inhaling, the valves are blocked, making sure all inhaled air travels through the mask filter.
The Airinum exhalation valves are specially designed to not spread exhaled air horizontally outwards, like when you are normally exhaling. The valve cap pushes the exhaled air to the sides of the valves. This reduces the spread of exhaled air. This is a similar logic to a surgical mask that doctors or dentists wear, which do not completely seal but direct the airflow away from the patient.