Mask cover has 2 layers of cotton fabric. Mask with a filter has 3 layers of cotton fabric, the back has a pocket for a filter. The elastic has stoppers so that you are able to adjust the size. 

The face masks I make are handmade. Wash your face mask after every use. This is not a medical device. It is not designed or intended to mitigate, prevent, treat, diagnose or cure any disease or health condition.