A Sports filter has a Hepa-Type™ filter layer which provides sub-micron (smaller than PM 2.5) dust filtering capability. Hepa-Type™ (Sub-micron filtration) - removes particles less that one micron in aerodynamic diameter.
NOTE: PM2.5 is a group of particulates known as respirable and sub-micron particulates are known as ultra-fine which are also respirable but even smaller in size. The Respro® filters listed below are all Sports filters.
The filter is replaced on the basis of a noticeable inhalation increase or major discolouration.
An Urban filter (Combination filter) has both a Hepa-Type™ filter layer and a DACC™ layer. This combination in one single filter provides sub-micron filtering capability, together with DACC™ ability to filter gases and vapours. It is the best type available in our range for dealing with the broad spectrum of pollutants commonly found in major cities across the globe. The filters listed below are all combination filters:
These are replaced on the basis of cyclist’s commuter journey of one hour a day. The filter should be replaced after 69 hours of use or 1 month whichever is the sooner.
Comfort and these factors determine how long you are likely to keep the mask on in any given activity.
Two valves are present on a mask to release the unwanted heat, water vapour and carbon dioxide from exhaled air.
The valves open when you exhale and close automatically when you inhale (breathing is a sinusoidal process). They do not need to be replaced. Within the valve sits a diaphragm (moving part of the valve – Latex free), that opens and closes within the valve when breathing in and out.
There are different kinds of valves and they provide different features and benefits depending on breathing rates.
Powa Elite™ Valve
DACC™ - dynamic activated charcoal cloth used in the adsorption process of gases and vapours on a molecular level.
HEPA-TYPE™ - acts like a Hepa filter as used in air conditioning systems for hospitals and clean rooms.
RAPID AIR FLOW™ - design system which allows a free flow of air without exhalation resistance.
AIR-PERMEABLE - allows for the movement of air through the material.
4-WAY STRETCH - a materials ability to stretch in four different directions.
NEOPRENE - durable, stretchable, washable material, that conforms to anatomical facial shapes and features.
INHALATION RESISTANCE - the amount of resistance to breathing air in through a mask.
EXHALATION RESISTANCE - the amount of resistance to breathing air out of a mask.
INWARD LEAKAGE - the amount of unfiltered air that passes though the sides/edges of a mask.
EXHALATION VALVE - allows for the venting of heat, water vapour and carbon dioxide produced on exhalation.
SINUSOIDAL - word describing the process of the inhalation and exhalation cycle.
WHO - World Health Organisation.
PRIMARY POLLUTANT - the pollutant types that are seen by the W.H.O. as a potential threat to health.
O3 - Low Level Ozone (LLO).
SO2 - Sulphur Dioxide.
NOX - Nitrogen Oxides
PM - Particulate Matter
VOC - Volatile Organic Compound
CO - Carbon Monoxide
PBO - Lead Oxide