Particle Filtration Efficiency (PFE) 
Our tests have been completed by FDA registered and ISO 17025 accredited Nelson Labs, the leading global provider of microbiological laboratory testing for MedTech and pharmaceutical companies.

Our filter media has been tested against a particle size of 0.1μm (microns) and received an average filtration efficiency of 99.50%.

Bacterial Filtration Efficiency (BFE)
Our filter media has been tested in compliance with ASTM F2101-19 and EN 14683:2019, Annex B. The filter media received a bacterial filtration efficiency greater than 99.80%.

Viral Filtration Efficiency (VFE) 
Our filter media has been tested in compliance with US FDA good manufacturing practice (GMP) regulations 21 CFR Parts 210, 211 and 820. The filter media received a viral filtration efficiency of 99.99%.

The mask can be washed like an item of clothing. Machine wash using cold soapy water. The electric module has to be detached before wash else it may not work properly. We do not recommend washing the filters as this will affect filtration performance, rendering them ineffective. But you can always replace the filter very week.

How long the filter lasts for depends largely two factors:
1) The level of particulate matter being filtered, as this will clog the filter over time.
2) How many hours in the day you are using the filter, the more hours will mean the more particulate matter the filter collects.

For high levels of pollution and for over 3-6 hours of daily use, we have found our filters are effective for around 1 weeks. There is no exact formula for how long the filter will last, however we recommend replacing the filter once breathing through the filter becomes increasingly difficult or the filter is visibly dirty for hygiene reasons.

We do not recommend washing the filters as this will affect filtration performance, rendering them ineffective.

We offer shipping to most countries around the world! Pleas check your shipping rates and timeframes at checkout.

The reason why glasses tend to fog is because hot air is escaping toward the the nose area of the mask, which means the mask is is not fitting to your facial contours. We have a firm but flexible nose wire built into the filter to ensure that it is able to fit a wide range of facial contours. This prevents hot air from escaping and fogging up your glasses. Also since the Caeli evo is build to make a continous flow of cool air in your mask the air inside never gets too warm to make your glass foggy.

Yes, very! The fit ear loops have been designed to provide enough tension for a firm fit without straining the user’s ears, so that the mask can be used for long periods of time with the module.