Product Name: N95 Layers Mask Antivirus Flu Anti Infection Kn95 Masks Particulate Respirator Pm2.5 Protective Safety Same as Kf94 Ffp Shape: Dust Mask Mask Type: Safe-Type Color: White Material: Superfine Fiber Mask Application: Medical Protective Mask Trademark: ZooHan Transport Package: Box Specification: 61X33X61 Origin: China Product Description 1. When n95 receives contamination such as saliva, blood, tears and other body fluids, it must be replaced2. The user obviously feels that the breathing resistance is greater than before and must be replaced3. Masks are damaged and must be replaced4. It is recommended to replace it after using it 4 times.However, masks cannot be reused if people go to the hospital, come into contact with an infected person, or are suspected to be infected.