It's time to believe in the science. Are you a science teacher, are you a science student, or in pursuit of a career in the sciences? This mask is for scientist. Comes with pockets inside to change filters. If you like, you can get it with inner facing, which acts as an permanent filter. The decision is yours. Packaged inside of a plastic bag which is sealed immediately after the mask production.
100% cotton which prevents odors that come from synthetic fabrics.