Medical surgical masks should be identified from the composition, packaging and standard number and so on. 1. Composition: the regular medical surgical mask is composed of three layers, the innermost layer is spunbond nonwoven, the main role is to absorb moisture, the middle layer is meltblown nonwoven, play a role in filtration, the outer layer of spunbond nonwoven, with the role of anti-flecking. 2. Packaging: medical surgical masks are packaged with the words “medical surgical mask”. 3. Standard number: medical surgical masks will have a unique standard number on the packaging, that is, YY0469-2011 standard. People who need to buy masks, it is recommended to go to a formal organization to buy, so as not to be deceived. When using it, you should wear it according to the requirements.