They are already a matter of course in public transport and shops: face masks. The mouthguard is intended to further limit the spread of the coronavirus. In hot, humid summer weather, however, they can be annoying at times. It's no wonder that developers are working to find a face mask that does its job and still doesn't interfere with breathing. New on the market: a foam mask. But does it keep what the developers promise? RTL did the practical test – you can find out the results in the video.
Source used: RTL