N95 face mask uses inside and outside layer filter, outer can intercept 5 microns of dust, the inner block human respiratory droplets of body fluids, secretions infection. The national exclusive specified technology to prevent N nitroso compound technology of cancer. Super Warming polymer blending technology can effectively decompose the dust for a long time, prolong service life. Using new soft and safe dust-proof cotton material and through ethylene oxide sterilization disinfection before they go out, better make the wearer comfort and peace of mind. (due to the raw material produced in the process of transport and processing of various subtle bacterial virus, can cause a variety of infectious diseases into the body, to strictly to ensure the safety of consumers, the company of all protective products are treated with ethylene oxide sterilization disinfection before they go out). Note: may be washing class masks of washing water temperature is 6~20 degree centigrade. Shall not exceed 30 degrees Celsius. Can't rub, otherwise it will damage the internal filter material, dry surface dust can wash gently only.