Our Nano Filter Masks are made from 100% Organic Woven Cotton which makes them safe for direct contact on skin, and also keeps its shape very well for a great fit over the mouth and nose. Nano Fabric Filter has more than 90% of filtration efficiency.
Tested with NaCl aerosol at inhalation flow rates of 95 liters/min and a particle size of 0.6 micrometers
Filters are recommended for single use only. This mask can be worn and meets guidelines without filters – filters are for extra precaution. Additional replacement filters sold separately.