1. The outermost layer is a non-woven fabric with waterproof treatment, which is mainly used to isolate the liquid sprayed by the patient and has the effect of preventing spray.
2. The second layer is hot air cotton, which mainly plays the role of heat insulation, moisture resistance, and improves the wearer's comfort.
3. The third layer and the fourth layer are two layers of melt blown cloth after electret treatment. The two layers of 28g melt blown cloth are used to ensure the basic filtration of bacterial suspended particles. It is the most important core layer.
4. The innermost layer is soft skin-friendly non-woven fabric, which is non-allergenic and improves the comfort of the wearer.