While a cloth mask alone provides a certain level of protection, the disposable PM2,5 filters will filter out particles as small as 2.5 microns. Each 5 layer filter is a combination of non-woven and meltblown cloth sandwiching an activated carbon layer. The filter slips easily in the inside pocket of all RainCaper reusable face masks.

Filters are sold as a pack of 10 in a hygienically sealed poly bag