About Combination filters
A ‘Combination’ filter, gives the user both sub-micron particle filtration with gas and vapour filtration. It is a combination of the City filter and the Sports filter. The sub-micron filtration capability of the Sports filter means is that it is able to trap particles less than one micron in size combined with the City filter for vehicle exhaust gases. This combination is the perfect filter for general urban pollution attributed to cars, buses and lorries.
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