Meiwa air filters are manufactured with the highest quality materials and production standards that match those of the originals. Meiwa air filters are made from microporous cotton paper that guarantees unparalleled quality and durability. The cotton fibres of the filter are made of filaments of different thicknesses, thicker towards the outer walls of the filter to catch the larger particles and thinner towards the inside to filter even the most microscopic particles (Multi Stage Filtration). Therefore, the filter has a longer life and a higher filtration capacity.