The disposable mask consists of more than three layers of 28-gram non-woven; The nose bridge is made of environmentally friendly full plastic strips, without metal, with breathable straps, comfortable and especially suitable for electronics factories and daily use. disposable masks can prevent respiratory infections to a certain extent, but cannot prevent cloudiness. When buying, you should choose a mask, on the outer packaging of which the word "medical-surgical mask" is clearly affixed.