Made of activated carbon and non-woven melt-blown filter cloth protecting from a range of airborne contaminants. Made of activated carbon and non-woven melt-blown filter cloth protecting from a range of airborne contaminants. 5 layer system to filter dust and airborne particles. These filters are disposable, cannot be washed and should be replaced every 1-4 days depending on amount of use. FOR YOUR SAFETY AND THAT OF OUR STAFF, ALL MASKS ARE FINAL SALE. NO RETURNS OR EXCHANGES. --- Includes 10 filters Fits inside the Zenbu Regular and Petite, Anshin and Shinyu mask filter pocket Specs Overall: 4.8 x 3.15 inches / 12 x 8 cm Care These filters are disposable, cannot be washed and should be replaced every 1-4 days depending on amount of use How to use! our masks. DISCLAIMER Graf Lantz products are only intended for civilian use and are not a substitution for medical-grade personal protective equipment or any other medical equipment. No representations or claims regarding Graf Lantz products are intended to substitute for professional medical advice.