More information


How to care for your Ambrela face mask

  • Wash the mask after 10-12 hours of use (1 time/day)
  • Wash the mask by hands, at maximum water temperature 40°C
  • Use regular soap, no aggressive washing/disinfecting liquids
  • Let the mask stand with the soap on for at least 1 minute, then rinse with water
  • Let the mask dry at room temperature
  • Do not tumble-dry!
  • Do not iron


How can you achieve high filtration efficiency and high permeability at the same time?

Filtration efficiency of a fabric is given by its fiber density (or the spacing in between the fibers). The higher the density of fibres (tighter spacing in between the fibers), the higher the filtration efficiency. Permeability of a fabric depends on the thickness of its fibers – the thicker the fibers, the worse the permeability. Figure below illustrates the structure of cotton (left) compared to non-woven fabric (right). Cotton fiber thickness is cca 3.5 μm, whereas non-woven fiber thickness is <0,3 μm. A fabric composed of thin fibers with high density provides high filtration efficiency and high permeability at the same time.


Non-woven fabric

Another parameter of fabric permeability is its ability to absorb liquids. Cotton is hydrophilic, i.e. absorbs liquids, which inhibits its permeability. Contrary, the fibers of non-woven fabric are hydrophobic, meaning they repel liquids, thus permeability is better.

Certificates & tests


Skin tolerance and irritation tests

Bacterial Filtration Efficiency (BFE) and Delta P EN 14683

conducted in NELSON Laboratories, USA

Bacterial efficacy test

Declaration of conformity and product parameters

All documents including the technical documentation are kept at the producer.