Harmful pollution it has been filtering out wherever you are in the world. with covid fears lingering, something that is designed to filter out airborne masters can provide real peace of mind, because i think it is really useful that something like this takes things a step further to tell you what you could be putting into your lungs wherever it is in the world that you're travelling to. one thing to be aware of though is that the accuracy of information depends on how close you are to an air pollution monitor, plus it is not the cheapest of masks. if you're thinking of having something to fli...