FeaturesInnovative designHuman body engineering design philosophy giving excellent comfortColourful magnetic front maskFood grade silica gel mask which is soft and easy to remove for cleaningEasy to change replaceable filterThis Air For Life Mask Clinical is easy to use & ergonomically designed for maximum comfort; it contains an electric fan for continuous airflow & a hypoallergenic silica gel nose & mouth cover. With state-of-the-art 4 stage nano silver ion filtrete technology for ultimate protection against up to 99% of all indoor & outdoor impurities such as bacteria, viruses, dust, pollen, air pollution (pm2.5), smoke, formaldehyde, benzene & other volatile organic compounds (VOCs)