Design & Engineering

ViralOff® Technology

The NanoFit Mask is self-sanitizing because it’s infused with ViralOff® technology by Polygiene, an award-winning Swedish company specializing in advanced treatments for textiles.


ViralOff is the first commercial textiles treatment in the world proven to reduce SARS-CoV-2 (the virus that causes the disease COVID-19) by over 99% in two hours using the ISO 18184:2019 test.


This antimicrobial treatment protects the mask and allows you to touch the mask freely. Because of this, the mask is reusable without needing to be washed — saving time and energy while decreasing your environmental footprint.

✓ Environmentally certified by Oeko-tex® Eco Passports
✓ In the process of being certified by bluesign®

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Polygiene ViralOff

ViralOff has been tested against against Influenza A, BirdFlu, Norovirus and Corona (SARS) and meets the ISO 18184:2019 standard* (Determination of antiviral activity of textile products).

Nanofiber Filtration Technology

Our 4-layer replaceable filter is equipped with nanofiber filtration technology and effectively filters particles as small as 0.3 μm (microns).


Viruses such as COVID-19 are often spread through respiratory droplets produced when breathing, talking, sneezing, or coughing. These droplets typically have a diameter of 5-10 μm.


Nanofiber technology provides superior filtration because, unlike traditional filters, it does not depend on static electricity to be effective. If a conventional filter gets wet, it will no longer function properly.


In comparison, our nanofiber filters maintain effectiveness in humid and wet conditions, such as rain, sweat, spit, and even condensation produced from regular breathing.

Nanofiber mask filter layers


Fit & Wearability

A well-fitting, comfortable mask is essential to ensure the mask stays in place and to minimize mask adjustments that might cause you to touch your face.


A correct fit also ensures harmful particles cannot leak through gaps between the mask and your face. 

Easy-remove elastic ear loops provide for comfortable wear and the detachable neck strap option offers additional support for extended wear.

face mask neck strap, mask ear saver

No Valve Contamination Risk

What is a mask exhalation valve?

Some masks, including non-medical N95s, have one or two small plastic pieces imbedded in their fabric called exhalation valves.


These are meant to help release heat and vapor from your mouth as you breathe; however, they can also release viruses, bacteria, and other pathogens from the mask wearer. Some regions have already banned masks with valves, such as the California Bay Area. Other cities are sure to follow.


The NanoFit Mask was designed with nanofiber for excellent breathability without requiring exhalation valves, so you don’t endanger those around you. 

If you have a mask with a valve, you’re not really protecting those around you, which is at least half of the point of wearing a mask in the first place.

Photo: Fast Company: Source Images: 3M, snake3d/iStock

Ready to get #SafeWithSilverTek?

THE NANOFIT MASK. We got you covered.

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ViralOff® is not intended to diagnose, treat, cure, or prevent any disease.  It is used for protection of the treated product.