... one-time non-woven mask 1,excellent quality(high quality 2,best service 3,The queen of quality The goblet with breathing valve ... better, for a long time to wear not tight, no allergic reaction; smooth fabrics to reduce fiber prop drop, disposable, ... and more hygienic. Applicable to: medical, beauty, food, health, electronics, clean room, public health places The medical blue one-time non-woven mask