It's civil sanitary masks that are in line with national standards.
And the specifications are as follows: First, it's without class fibres. Second, it's hypoallergenic. Third, it has very low resistance to breathing. Forth, it is nose bar adaptable. Fifth,it has high filtration capacity and it is perfect ftting.
Civil sanitary masks are used to filter the air entering the mouth and nose, so as to prevent harmful gases, smells and droplets from entering and leaving the mouth and nose of the wearer. Mainly divided into cotton mask, non-woven mask, polymer material mask, active carbon powder filter mask, active carbon fiber felt pad mask.