The eyebrow-raising design has a motor, compressor fan and air purifying dual-layer filter in each ear cup. The air is drawn through the filters cleaning it of 99% of particles as small as 0.1 microns, including pollen, bacteria and dust, as well as gas pollutants such as sulphur or nitrogen dioxide. The filtered air is then pushed along the inside of a visor, which sits just in front of the mouth and nose without making contact with the skin, creating a pocket of clean air for the wearer to breathe. The headphones have sensors that detect how fast the wearer is moving, automatically adjusting the airflow between three intensity levels to ensure they deliver up to 5 litres of clean air a second, the equivalent breathing rate of a jog.
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