Cute aloha fabrics as well as fun designs perfect to protect others and yourself from breathing in particles in the air. There is a pocket located on the inside, this pocket allows a coffee filer to be slipped in. This part is optional but there for those wanting extra protection. Just switch the filter out whenever you feel necessary. Also machine wash and reuse. Stick it in the dryer or hang dry. These masks offer an adjustable strap on the side as well as a smaller ear strap.