Medical masks are made of non-woven fabrics. This material does not need to be woven. It is made of some fibers. It is often made into 2-layer masks, 3-layer mouth layers, and multi-layer activated carbon masks.
Medical masks can effectively prevent fine dust in the air, especially for respirable dust below 2.5 microns, because the dust of this particle size can directly enter the alveoli, which has a great impact on human health. The principle of use of medical masks is that when dust passes through the gauze, it will pass through a layer of barriers, and the dust will be absorbed on the gauze, so that fresh air enters the respiratory system.