beautress
Always Faithful
If one wears glasses and wishes to see whether their mask is effective, one need only to place the mask upside down and exhale. A mask that would otherwise stop moisture will effectively relay steam up and covering the inside lenses until the mask is returned to right side up position in which the thin wire may be properly pressed down to prevent steam from fogging the glasses as well as preventing the transfer of the virus that has a very short life without H2O, its principle transference agent, to the best of my knowledge. Please do not use this test if you are driving an automobile. Thx.If one were to form a math equation about how many times larger the effective holes are when layering masks, what other information would need to be known besides the distance between the masks and if the masks all used the same fabric?