1 Box of 20 3M Healthcare Particulate Respirator and Surgical Mask Size: Small Do not contain either natural rubber latex or dry natural rubber as components in the products or packaging Fluid resistant to help reduce potential exposure of the wearer to the spray, spatter and aerosol of blood and body fluids NIOSH approved as a Type N95 respirator to meet OSHA requirements and CDC guidelines for TB exposure control. Tests conducted by NIOSH in accordance with 42 CFR 84 Can be used during laser surgery, electrocautery and other procedures using powered medical instruments to help reduce wearer exposure to airborne particles (plume, smoke) generated during these procedures