Matilda's Own Mask Filter Inserts
Using the knowledge gained by making mask filters for the CSIRO in recent trials, Matilda's Own have created this highly efficient face mask filter. 100% Made in Australia from Hollow Conjugated Polyester for moisture absorption and extremely effective particle filtration.
Each pack contains 4 x A4 sheets, measuring 210mm x 297mm for use with your own cotton outer.
Makes up to 24 refills. Refills are washable but we recommend replacing them after each use.
Free Victorian Goverment Mask Pattern can be found here