•  These Activated Carbon PM2.5 filters are 10.8cm x 8.3cm in dimensions and compatible with all Circios Reusable Face Masks. 
  • PM2.5 filters are originally designed for filtering toxic air from bushfire and urban air pollution. While they have passed the PM2.5 standards, they are not medical grade filters.
  • PM2.5 filters will provide more protection compared to plain cotton fabric. 
  • Made with 5 layers of melt-blown, spun-bond and activated-carbon fabric.  
  • PM2.5 filters WILL NOT provide 100% protection against viral and bacterial infections.