Mountain Mist DIY Face Mask Filter-
DIY Face Mask Filter Media provides an added layer of protection to homemade and store-bought face masks. The 100% needle punched polypropylene filter material boasts a 75% efficiency in blocking airborne particles. Can be cut to any size. This package contains 3 yards of 24 inch filter media. Material: 100% Polypropylene. Machine washable, lay flat to dry. Made in the USA.