Naturally freshen the air in your home with the Holmes WeMo Whole House Smart Humidifier Filter. Compatible with Holmes WeMo Whole House Smart Humidifiers this humidifier filter replacement is enhanced with Arm & Hammer Baking Soda to help absorb and eliminate unwanted household odors from garbage bathrooms pets litter boxes smoke and cooking. Containing both a carbon X layer and an antimicrobial layer the filter also traps impurities in the water and inhibits the growth of bacteria mold and mildew. Each humidifier filter is designed to last for up to six weeks.