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Our masks feature a wafer-thin nanofiber membrane, which is considered the gold standard in filtration efficiency. Our filter is especially unique in that it is washable, which enables each to be sewn-in for corner to corner coverage. In fact, our masks have been tested to maintain ~95% filtration after 50 washes. The Repeated Wash Test was conducted by ICS Laboratories, which has been accredited by the American Association for Laboratory Accreditation (A2LA) to the ISO/IEC 17025 standard. The full report can be viewed here.

Nanofiber membrane filters are often referred to as a “unicorn” filter for its unique ability to simultaneously achieve the following 3 properties below:

1. Powerful Filtration

Our filters have an ultra-fine web-like barrier, made of fibers 1/500th the width of a human hair, that physically prevent particles from passing through the mask. They have been tested by Nelson Labs and the Taiwan Textile Institute to block over 99.9% of particulate matter (PM) 10, 2.5, and 0.3. To put this into context, dust particles are PM8, bacteria is PM3, and pollution and viruses are < PM1.* Our standard of filtration is one of the best available on the market. If you'd like to view our Nelson Lab test reports, you can download the Viral Filtration Efficiency and the Bacterial Filtration Efficiency tests.

*Disclaimer: Happy Masks are not devices intended for use in the diagnosis of disease or other conditions or in the cure, mitigation, treatment, or prevention of disease and do not meet the definition of a medical device as set forth in section 201(h) of the FD&C Act. 

2. Highly Breathable

The controlled stretching process used to create our nanofiber filter creates millions of micropores per square centimeter, which then enables air to flow more evenly and easily.

Normally, high air flow also means low filtration efficacy. However, the micropore diameter in our filters range in size between 0.1 to 0.5 micrometers, which is wide enough for air to pass freely but still provide effective filtration. 

3. Lightweight and Flexible

Most other filters are made out of carbon or a polyester felt material, which need to be a certain thickness to “trap” particles. That means they are heavier and bulkier in comparison. The nanofiber membrane we use is wafer thin, lightweight, and flexible, which makes them significantly more comfortable than other filter materials.