Because I always had to cough behind the mask and I suspected a lack of oxygen, I tried to prepare such an FFP2 mask by cutting out the inlet with a small pair of scissors. The crap fuzzed like an opened hoover bag and I found it so alarming that I never put such a thing over my nose again.
Because I always had to cough behind the mask and I suspected a lack of oxygen, I tried to prepare such an FFP2 mask by cutting out the inlet with a small pair of scissors. The crap fuzzed like an opened hoover bag and I found it so alarming that I never put such a thing over my nose again.