A doctor in the United States informed me over a Whatsapp conversation when I first started making these face masks that the test for an N95 and it's fit in the hospital was that they would spray perfume in the face of the person fixed with an N95 and ask them whether they could smell the scent. Of course, this is very subjective as some people have no sense of smell, but we tried it at the Studio, putting an N95 on and then putting our own on. I do not suggest that ours are N95, nor do I expect you to trust me, so I am imploring you to test them at home for yourself and enjoy our little experiment, the first of it's kind for us!