2 layered face barrier mask with space for additional filter layer.Masks are available in two sizes: S-M (standard size) and M-L with open ended elastic straps for the wearer to create it’s preferred tie method; behind ear or tied around the back of head. These masks are made with Your outer fabric and lined with two layers (one of the layers works as a filtration layer) of a black poly-cotton for extra protection. Material for outer matrial: 100% Cotton Material for lining material: 65% Polyester 35% CottonThese masks are made for adults and comes in two sizes:• S-M 24 cm ear to nose to ear (standard size)• M-L 28 cm ear to nose to ear. These masks can be manufactured in most fabrics. We would however recommend a close woven fabric for best protection. Fabric requirements;S-M 15cm (h) times 18cm (w) Masks are not medically certified. Please get in touch if you have any questions in regards to this. For hygiene reasons this item is not returnable. THIS IS S/M 100% Cotton recommended 30'degress delicate wash or hand wash.