Nanotechnology: ‘Nanofibers are incredibly small fibres – thousands of times thinner than a human hair. Nanofiber’s form spider web-like structures which have an advantage over conventional or even natural filters due to their massive surface area, large pore numbers, and tiny pore size. Each mask filter is estimated to contain over 25km of nanofiber in an area less than 1mm thick. This not only creates the highest filtration/protection, but also leads to the lowest inhalation and exhalation resistance, which makes our masks highly comfortable and breathable. It is a N95 and FFP2 mask.