The Cambridge masks use patented carbon filtration technology made from 100% pure activated carbon cloth, developed by the UK Ministry of Defence who went on to extensively develop it for use in chemical, biological and nuclear warfare protection. The 100% pure activated carbon cloth is made from pure carbon and sourced from pure carbon. The creators of the carbon layer use a very unique method to create the fabric, involving two furnace processes and treatment with silver to help the antiviral properties.
N99 rating guarantees consistent filtering of more than 99% of particles including PM10, PM2.5 and even PM0.3
All activated carbons have the unique potential to absorb gaseous molecules, including anions and cations into their internal pores. The filter material is made up of a series of activated carbon filaments, which are about 2,000 nanometers in diameter, making the adsorption of pollutant gas, much faster and more powerful. The high number of filaments are spun into yarn and then woven into cloth.
Bacteria and viruses are drawn to the filament surface more efficiently because there is so much more available surface than in granular carbon. The activated carbon cloth traps the bacteria and draws out the gel-like cytoplasm inside killing it and preventing infection. Silver is added which helps to enhance these antibacterial/viral properties. Stops 99.6% of viruses and filters and kills 99.77% bacteria.