China Medical Mask
N95 mask, which is popular on the Internet, has a filtering effect of 95%. But for the N95 mask, the doctor reminded the public to pay attention: "in theory, the more airtight the protective material of the mask, the better the effect of blocking particles. Conversely, the more airtight the mask is, the more difficult it is to breathe. Especially for patients with cardiovascular disease, wearing it badly may also cause dizziness and dyspnea due to lack of oxygen. It is more prudent to wear it. "China Medical Mask
website:http://www.yuexi-china.com/medical-mask/
>http://www.yuexi-china.com/medical-mask/
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