Carbon PM2.5 Filters | Electrostatic PM 2.5 Mask Inserts
Laboratory testing shows when you pair a properly fitted cloth mask (called a pm2.5 mask) with a pm 2.5 filter, you can achieve up to 90% filtration against aerosolized particles in the critical sub-micron range. This is significantly more fine-aerosol protection than most cloth masks (even most surgical masks!) but far less inhalation resistance than a medical-grade respirator.