- These Activated Carbon PM2.5 Filters are 10.8cm x 8.3cm and compatible with all Circios and Cumulus Reusable Face Masks.

- They're made with five layers of melt-blown, spun-bond, and activated-carbon fabric.

- Our PM2.5 filters were designed with urban air pollution and toxic air from bushfires in mind. They meet PM2.5 standards but are not medical-grade.

- PM2.5 filters WILL NOT provide 100% protection against viral and bacterial infections. They do provide more protection than plain cotton masks.