This is a non-medical protective face mask. The accordion style face mask expands to ensure both your nose and mouth are completely covered. Each mask has fabric ties to ensure a tight enough fit for any head size. Simply tie the top two ties around the back of the head over the ears to ensure it doesn’t slip down. Secure the bottom two ties around the back of the head where it meets your neck. The ties have been stitched to prevent fraying, but if you get loose strands from use, you can cut them off or leave them alone- it will not fray completely. Mask care: Spot clean as needed, machine wash cold, lay flat to dry. Iron as needed.