3.excellent filtration efficiency: The advanced humidifier wicking technology of this filter change to a brownish color, this means the filter is working! 2.wood pulp&paper filter: Crafted from high-quality wood pulp and paper materials, this humidifier replacement filter effectively filters out particles, providing clean and fresh mist for a healthier living environment. 1.Perfect compatibility: Our Humidifier Wicking Replacement Filter Compatible with for Canopy Bedside Humidifier ONLY. 4.Humidifier Wicking Replacement Filter. We recommend you replace the replacement filter every 6 weeks for optimal performance (depending upon your usage and environment). Easy to install, no tools required. Take out and replace your machine unit when