In order to have good breathability in a mask especially when undergoing exercise or other activities involving physical exertion, it is essential that the mask breathes freely and does not create either a pressure drop or back pressure within the mask.
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Heat, carbon dioxide and water vapor, three components of exhaled breath, need to be exhausted from the mask in readiness for the next breath of inhaled air. If this process of evacuation fails or is impeded, then the mask may become uncomfortable with poor airflow and may result in the wearer not using the mask.
We therefore believe that exhalation valves are an essential component which allows the mask to perform well under the conditions described above.
The valves in Respro® masks are designed to reduce or eradicate any of the above effects and are available in accessory packs, allowing the user to tailor a product specifically to their own needs.
In 2005, it was estimated that approximately 1,000 accelerated deaths and 1,000 extra respiratory hospital admissions occurred in London as a result of PM10 air pollution. In truth, Londoners only have to see what lorries and busses are kicking out to be sold into the concept of protecting their health. Masks provide the only way to block out lung irritants and other pollutants, many of which are carcinogens. So what can an anti-pollution mask do to help? Masks help prevent lung irritation and cancer. Many different pollutants - when mixed together - can cause irritation to respiratory systems. Wearing a mask helps to prevent cancer as there are known carcinogenic agents such as pyrene and benzene present in gas; gasoline fumes. There are also less weighty reasons for wearing a mask. The masks are an awareness statement to the other road users in cleaning up the environment.
Respro product designer Harry Cole had "in your face" experience of exhaust fumes and city smog as a London cycle courier and this is still a significant and growing problem. In 1990, Respro launched the City mask, the first cyclists pollution mask and it is still in demand today. Over the last decade, awareness of air pollution has grown and now cyclists can choose from a wider range of styles and filters to accomodate more individual needs. Respro masks are supplied with replaceable filters and exhalation valves to keep the inside of the mask well ventilated.
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