Made with two layers of lightweight cotton, with elastic at either end that can be adjusted. Just tie the elastic to suit your fit then slide the knot into the casing of the mask. Hand wash in warm soapy water, and lay flat to dry. (Don’t wash your mask with bleach, don’t drink bleach, don’t inject bleach, don’t Covfefe bleach). You can find the guidelines on wearing and caring for your mask on Alberta.ca.