Model No. Mars-B-20001 Product structure The product consists of four layers of nonwoven fabric, ear loops and nose clip. Material PP Polypropylene & non-woven fabric Application Protect against aibrone pollutants such as haze, PM 2.5 and viruses Feature Designed to seal well on the face to ensure N95-Class of protection Service life 2 Year FDA Registerred Establishment NO. 9615583 CE EN14