HQRP Filter 3-pack for AirCare MAF2 MA0800 Humidifier + HQRP Coaster HQRP&reg; 3-pack Humidifier Wick Filter Replacement plus HQRP&reg; Coaster; Improves efficiency of the humidifier, traps water impurities, eliminates "white dust"; AntiMicrobial agent prevents surface growth and migration of mold, mildew, fungus, algae, and bacteria; 2 weeks DOA replacement warranty!