Mask filter material is spun bond polypropylene making it ideal for face masks.
non woven interfacing that is lightweight and breathable.
1 yard package 20" wide.
Polypropylene is a safe material to use as a filter between two pieces of cotton or linen fabric. According to the Government of Canada, face masks should be made of at least 2 layers of fabric with one filter (such as non-woven polypropylene fabric) in between (3 layers of material in total). Filters, such as non-woven polypropylene, add extra protection by trapping small particles of infectious material.