From Chain Reaction Cycles! Yeay!
Respro Nitesight Mask (L) (which has the same specs as the City Mask)
http://www.respro.com/protection-faqs/#q2
"1. The City filter uses Dynamic Activated Charcoal Cloth (DACC) a 95% pure charcoal weave, originally developed by the U.K. Ministry of Defence for use in the protection against chemical and bacteria warfare situations. We use DACC to effectively filter out Primary pollutants associated with vehicle exhaust emissions. The DACC is laminated with medical grade non woven polypropylene material which filters particulates from the air and helps prevent them from entering the respiratory system.
The City filter offers protection against: - Hydrocarbons. e.g. Benzene; Pyrene;1,3 Butadiene. - Acid gases. e.g. Nitrogen dioxide; Sulphur dioxide. - Photo-chemical pollutants. e.g. Low level Ozone - Particulates. e.g. Black smoke; Pollen; Lead oxide. For a more comprehensive list of all the chemicals that have tested with DACC, please go to the Industrial section of the website."
According to the NEA, haze consists of:
http://app2.nea.gov.sg/psi_faq.aspx
sulphur dioxide,
nitrogen dioxide,
ozone,
carbon monoxide
particulate matter called PM10 (particulate matter of 10 microns or smaller in size)
Respro Nitesight Mask (L) (which has the same specs as the City Mask)
http://www.respro.com/protection-faqs/#q2
"1. The City filter uses Dynamic Activated Charcoal Cloth (DACC) a 95% pure charcoal weave, originally developed by the U.K. Ministry of Defence for use in the protection against chemical and bacteria warfare situations. We use DACC to effectively filter out Primary pollutants associated with vehicle exhaust emissions. The DACC is laminated with medical grade non woven polypropylene material which filters particulates from the air and helps prevent them from entering the respiratory system.
The City filter offers protection against: - Hydrocarbons. e.g. Benzene; Pyrene;1,3 Butadiene. - Acid gases. e.g. Nitrogen dioxide; Sulphur dioxide. - Photo-chemical pollutants. e.g. Low level Ozone - Particulates. e.g. Black smoke; Pollen; Lead oxide. For a more comprehensive list of all the chemicals that have tested with DACC, please go to the Industrial section of the website."
According to the NEA, haze consists of:
http://app2.nea.gov.sg/psi_faq.aspx
sulphur dioxide,
nitrogen dioxide,
ozone,
carbon monoxide
particulate matter called PM10 (particulate matter of 10 microns or smaller in size)