High Quality 4 Layer Mask Medical Face Mask KN95.
4-layer high-effective filter the bacteria structure.
The frist layer--Double soft non-woven 70g, Absorbs dust, odors and harmful particles.
The second layer--ES Hot air filter cotton 50g, pre-filtering the particulate matter and bacteria.
The third layer--Meltblown non-woven 25g, thicker than the others, that filters more than 98% of bacteria.
The forth layer--Skin-friendly non-woven 50g, not only filter particulates but also friendly to sensitive skin.