Designed following the European Regulations UNE-EN 14683:2019 + AC:2019, this replaceable mask filter has been created to improve the protection of your face mask. Composition Replaceable filters to improve face masks protection. 5-layer filters with a 99% of Bacteria Filter Efficiency. Certified with UNE-EN 14683:2019 + AC:2019 regulations. Breathability, Hydrophobicity, Antimicrobial, Antibacterial. Each filter guarantees a total of 8 hour use. After these 8 hours the filter won’t be preforming correctly. Care Wash your hands before placing the filter inside the mask. Stretch the top and bottom of the mask to open the inside pocket. Place the filter inside the mask pocket. Ensure that the filter is properly positioned inside the mask. After 8 hours of use, wash the mask and change to a new filter. Attention!  · The appropriate barrier gestures should be applied when wearing the mask  100% designed and made in Spain.