Nanotechnology is manipulation of matter on an atomic, molecular, and supramolecular scale. It allows for the creation of materials with very precise molecular structure and mechanical parametres, because it can be controlled on the level of smallest particles.

SEQUOIA ViralShield masks use ultra-light and filtering nanomembranes, made of high-density nanofibres. The unique combination of innovative filtering materials provides highest standards of protection and guarantees increased breathing comfort for the user.

Membrany filtracyjne:

W maskach SEQUOIA ViralShield zastosowano innowacyjne ultralekkie, membrany filtracyjne NanoPro, wykonane z nanowłókien o gęstym splocie, które dzięki swojej strukturze, zapewniają optymalny komfort oddychania przy zachowaniu maksymalnej ochrony układu oddechowego.

Filtration material:

  • ultra-light and ultrathin nanofiber
  • 3-layered structure
  • approx. 95% porosity
  • hydro- and oleo-phobic material working as mechanical barrier to stop viruses and bacteria


Dense structure – better filtration of harmful particles.

The NanoPro membranes are composed of nanofibers which are approx. 1000 times thinner than a human hair. The nanofibers form a high-density structure which is resistant to damage and able to stop even the smallest solid and airborne particles.

Larger filtration area – more comfortable breathing.

High-density network of ultra-thin nanofibers and billions of micropores helps combine the highest level of protection with excellent breathibility.

Unaffected filtration efficiency during the entire lifetime of the mask.

The specific filtration area of nanomembrane is approx. 15000 larger than that of nonwoven fabric or melt-blown. Contrary to the electrostatic filters which lose their efficiency when exposed to humidity, NanoPro, being a purely mechanical filtration layer, guarantees efficiency of the filtration layer during the lifetime of the mask.

Validity and storage

Improved durability of the nanofibre layer enables extended storage time of masks, making them suitable for use as disaster and epidemic relief safety stocks.