To adjust the mask there is a bead on each side that you move to tighten. These face masks are made of cotton fabric and DO NOT come with a filter. A filter opening can be added on the back of the masks to insert your own filter. DO NOT put these in the washer in dryer as the bead is wooden and will break. Lysol it or hand wash the adjustable mask. This mask is also available in elastic.
Contact us with any questions.