Here is a list of fashion designers that have changed gears and started making handmade cotton face masks. Not all these fashion masks are100% cotton, but, if they are not 100%, they are mainly cotton.
They are also NOT medical grade face masks. They are for everyday use by the public for extra protection against the coronavirus or flu or any other virus or bacteria for that matter. Many stores are beginning to implement a face mask requirement to enter their stores.
Check out creative designs that some are putting on their face masks.
The great thing about these masks is that they are washable and re-usable. Make sure to wash them before you use them.
According to ScienceDaily:
One layer of a tightly woven cotton sheet combined with two layers of polyester-spandex chiffon — a sheer fabric often used in evening gowns — filtered out the most aerosol particles (80-99%, depending on particle size), with performance close to that of an N95 mask material. Substituting the chiffon with natural silk or flannel, or simply using a cotton quilt with cotton-polyester batting, produced similar results.