The primary antibacterial cotton filters which block dust & larger practices

An efficient activated carbon filter which prevents bad odours and harmful gasses from being inhaled 

A germicidal nano silver ion layer which is sprayed on the HEPA filter. It uses a 3M’s H11 grade filter that removes particles up to 0.3microns, allowing it to kill harmful bacteria and viruses such as Staphylococcus Aureus and E. Coli

The same antibacterial cotton as stage 1 to double the protection