BreatheLab 4-Pack Premium Humidifier Filters, Compatible with Honeywell HAC-504, HAC-504AW, Filter A, HCM 350 & Cool Mist Humidifiers – Replacement for Select Honeywell Models

["BreatheLab 4-Pack Replacement Humidifier Wick Filters – Includes 4 durable wick filters compatible with Honeywell Filter A HAC-504 series humidifiers. Designed to help support steady moisture output and dependable everyday humidifier performance.","Reinforced Wick Design Helps Reduce Sagging – Built with rigid absorbent paper to help the filter maintain its shape when wet, reducing collapse or sagging during regular use.","Compatible with Multiple Honeywell Models – Compatible with Honeywell HCM350W, HCM-350, HCM350, HCM-350B, HCM-350W, HCM-300, HCM-300T, HCM-305T, HCM-310T, HCM-315T, HCM-450B-CST, HCM-500, HCM-530, HCM-535, HCM-540, HCM-550, HCM-560, HCM-600, HCM-630, HCM-631 and other models using Filter A HAC-504 wick filters.","Simple Maintenance for Better Performance – For best results, flip the wick filter regularly and use distilled water when possible. Hard water may shorten filter life and cause mineral buildup or yellowing over time.","Pre-Soak Before Installation – Soak the wick filter in cool water before placing it into your humidifier to help support smooth moisture absorption and consistent operation from the start."]