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Frequently Asked Questions

Do the filters need replacing, if so, how often?

Yes the filters do need replacing.

1. The effective working life of the UrbanXMasks™ filter depends on a number of factors, such as; the breathing rate of the user; ambient levels of pollution; the length of time the filter is actively working; hygiene levels. Taking these factors into account we recommend that the filter should be replaced every month or every 69 hours, whichever is sooner.

2. Replacement of the UrbanXMasks™ filter should be carried out every month or when the filter becomes noticeably discoloured.


What particle size does the UrbanXMasks™ filter out?

The UrbanXMasks™ filter has sub-micron filtration capability. What this means is that it is able to trap particles less than one micron in size which is more than capable of the removal of 2.5 micron particulate material (PM).

Typically particulate pollution in the cities appears to be in the 2.5 micron size range and above. Particles smaller than this are known as respirable dusts, which can lodge deep within the lungs and air sacs. This is the more dangerous type of particle pollution as chemicals from vehicle exhaust gases combustion known to be toxic, are carried by means of the respirable particles. Hence the need for a Hepa-type submicron particle filter.

The DACC Activated charcoal layer within the UrbanXMasks™ filter has excellent adsorption properties when it comes to SO2 and NO2 uptakes. With this capability and its capability of filtering VOC’s it is the best filter available in our range for dealing with the broad spectrum of pollutants commonly found in major cities across the globe.


Do I need to replace the valves?

The valves should not need replacing on a regular basis assuming that they are maintained properly. On a monthly basis, it is advisable to flush the valves through with warm water to remove any tissue salt build up from condensed water vapour from your breath evaporating on the valves working surfaces, the diaphragm can be removed in the cleaning process and reassembled once all the components have dried.


Can the mask be washed?

It is recommended that you wash the neoprene shell of the mask every month under normal use. To do this it is necessary to remove the filter and the valve first. Although spare valves and filters are available from your retailer, please be careful not to misplace any of the components during maintenance.


What is Air Pollution?

Air pollution is made up of two distinct categories:

1. Gases and Vapours

2. Particulates

Most types of pollution can be put into one or other category.

Gases & Vapours:

Nitrogen oxides

Sulphur Dioxide

Carbon Monoxide

Low level Ozone

Hydrocarbon Chemicals



Asbestos dust from brake linings


Road dust

Black smoke from diesel emissions

Any other material which is solid in nature


Particulate Types:

Inhalable and Respirable.

Inhalable particulates: are the particles big enough to be trapped within the nasal hairs and the mucous membranes at the back of the throat. (Larger in size than 2.5 microns)

Respirable particulates: are the particles that pass beyond the nasal hairs and the mucous membranes of the throat and pass into the lung sacs and subsequent blood barrier.

These particulates can carry carcinogenic chemicals used in petrol (benzene, pyrene, etc) to the blood barrier. (Smaller in size than 2.5 microns)


Can I wash the filter?

- The filter material may be washed, but ordinarily we recommend ‘hand washing’. Machine washing can be somewhat vigorous which can abrade the material by being washed with other garments. Some washing powders also contain fragrance additives which the filter will certainly pick up.

The best procedure now would be to follow our washing guide and hopefully your filter will still be useable.


To ensure good hygiene/care measures we suggest that you place the filter and valves in a pan of freshly boiled water (remove pan from heat source before putting filter in) and let it cool down. Remove the filter unit from the water and allow to stand dry.
This procedure will remove facial oils that may build up over a period of continuous use and will also remove some of the particulates and organic vapour that will be present within the Charcoal structure of the filter or tissue salt build in the valves.

If the mask cover requires washing this should be done by carefully removing the filter assembly and then washing the outer casing in warm soapy water and then left to dry naturally (not forced by means of heaters and driers).


How can I ensure the mask is clean after using for a while?

The  mask and filter should be treated like an undergarment and regularly cleaned.

To ensure good hygiene measures we suggest that you place the filter and valves sub-assembly in a pan of freshly boiled water (remove pan from heat source before putting filter and valves in) and let it cool down.

Remove filter and valve unit and allow to stand until dry.

This process will remove facial oils that may build up over a period of continuous use and ensure that it is hygienically clean. The procedure will also remove some of the particulates and organic vapour that have been filtered within the filter or tissue salt build-up from exhalation through the valves.

If the mask cover requires washing this should be done by carefully removing the filter and valve assembly and then washing the outer casing in warm soapy water and then left to dry naturally (not forced by means of heaters and driers).