This product is composed of a mask body, a plastic nose clip and a mask belt; the mask body is composed of an inner and outer layer of non-woven fabric and a middle layer of polypropylene meltblown non-woven fabric; the mask belt is elastic or non-elastic. The products are delivered in both sterile and non-sterile forms. It is worn by all types of personnel in a general medical environment, covering the mouth, nose and jaw of the user, and providing a certain physical barrier to prevent the direct penetration of pathogenic microorganisms and particles. Non-sterile products cannot be used in places with strict microbiological index control requirements.