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. Come in 2 sizes, S-M and M-L. Please message at checkout. I can also make them in children’s sizes. Follow Alberta Health’s guidelines on wearing your mask. You can find them on Alberta.ca.