These sterile caps have a 3-layer filter, lightweight, glass fiber-free, hypoallergenic and offer reasonable to good protection for the wearer, especially from the inside out. They are equipped with ear elastic and a flexible noseband, so that they can be bent well to everyone's nose. Very high quality filter and absorbent inner layer. For example, the 3-layer system absorbs the moisture of the breath; bacteria and germs are filtered and exposure to blood, saliva and liquids is significantly reduced. These are the caps that the general public in China usually wear on the street. Ensure a good fit on the face when wearing!