Its durable and soft microfibre fabric makes the AirPop Smart air pollution mask lightweight. The over 300 micro-perforations in the mask ensure optimal breathability and heat transfer for people living in areas with pervasive air pollution. The replaceable filter inside the mask has a 360° seal made of hypoallergenic TPE, a silicone-like layer, which seamlessly adapts to the face, preventing gaps and leakage at the nose and chin. A digital sensor measures breathing rhythm and air quality.