Two layer cloth face mask with pocket for filter.
As we are using recycled fabrics, content may vary.
Outer layer is often cotton or poly cotton with a tight weave, middle layer is always a poly/cotton and pocket (inside layer touching face) is a soft cotton. 
Elastic head/neck tie  can be adusted by re- knotting for the perfect fit. If the mask does not feel secure enough on your face, tighten the elastic loops. 
If you prefer ear loops, simply cut and re-knot.
Elastic may vary between balck and white, depending on availability. 
Lining fabrics may differ , depending on availability.