1. It is recommended to match medical protection mask and friends with respiratory protection equipment, the longest cannot exceed 8 hours of continuous use , It will be replaced. If there is damage and the air tightness is not good, it is recommended to replace the mask immediately.
2. It is recommended that friends who wear disposable medical surgical masks should change the mask every 4 hours. If you encounter damage, please change the mask immediately.
3. It is recommended that friends who need the best type of protective masks should choose medical protective masks. It is recommended to choose N9X or KN9X masks, and at the same time choose the standard number of GB19083-2010 masks.
4. It is recommended that friends who need general protective masks should choose respiratory protective equipment. It is recommended to choose masks with the standard number of GB2626-2006.
5. Buying masks should go through formal channels. It is not recommended that you buy them online. In particular, do not buy masks that cannot be screened and provided corresponding to the national standard testing standards. Make sure that the masks you buy can effectively play a protective role.