Self-purification filter function:The chin has 99% of the standard air filter capacity, thanks to the carbon filter in the chin and self-purification functionHigh-quality and stylish design: It is made of ultra-light weight PC and has ventilation and air quality sensing When you need it, it will accompany you, and the accessory will become a part of your fashion accessories.Ergonomics, protect makeup: comfortable style. Easy to use, just like glasses with folding temples! Will not interfere with makeup or hair! The ergonomic design and its elegant beauty make it an accessory for everyday use at any occasion and time of the year.Use occasion:You can use it in any mode of transportation: bus, taxi, bicycle, scooter, administrative, elegant, casual, modern...in your business, meeting, work, unlimited interaction with friends, Designed to perform any sports activity outdoors or indoors: cycling, jogging, gymect.