These masks have charcoal inside the material.
The masks are polyester, carbon-activated, anti-microbial, washable, reusable, breathable and have 2 adjustable elastic straps in the back and two cord locks to create the custom fit. One strap goes around the neck and the other one goes around the middle of the head. Dimensions are 8” 1/4” from ear to ear and 6 1/4” from nose to chin.
This white mask has black specks in it. That is because the speks are the actual charcoal in the fabric!