Pollen filters don't catch everything & an actual heap filter for a 450 smart car is unlikely to say the least, so can anyone recommend a small 12v one / sub socket capable to tidy up the cabin air ..living by rape fields the daughter has just started sneezing, so a "catch all" solution is being sought.

Nothing to do with covid-19 ..just seems daft not to reduce airborne contaminants & cabin engine pollution as someone who gets knocked about by pollen to keep eyes on the road, we have 3 heap units indoors indoors for dog hair & it helps considerably. (I didn't get it myself till I lived in london, ..hayfever that is).