PM2.5 FILTER - DESIGNED FOR REAR POCKET FACE MASKS

• Imported
• PM2.5 Filter for All Masks with Rear Pockets 
• Able to Filter Particulates as small as 2.5 microns (micrometers)
• Effective for about 35 - 50 hours of use Depending on Air Condition
• Effective for General Purpose, Oral Liquid Transition and Viruses
• This Filter is NOT Reusable
• DO NOT WASH