Replacement filters for the Airinum Urban Air Mask 2.0. The Urban Air Filter 2.0 provides superior protection (KN95) against harmful particles in the air. The multi-layer filter technology is tested in world-class Swedish laboratory RISE. The filter is available in 4 sizes and each filter pack contains 3 replaceable filters. How long does a filter last? The filter lifetime depends on many factors such as the pollution in your surroundings. Our filters last for about 1 month of usage, but we advise changing every second week for hygienic reasons. Tags: face mask, virus mask, anti-pollution mask, KN95, N95, FFP2, pollution, anti-pollution, pollution mask, covid, corona, virus, bacteria, dust, wildfire, bushfire, mold, odor, smoke, gas, certified, UV mask, filter, μm, PM 2.5, pollen mask, pollen, respiratory diseases, Swedish, Scandinavian, award, award-winning, premium, tested, traffic pollution