Right Size: Each humidifier wick measures approx. 8mm / 0.31" in diameter, the size for your daily needs, easy to cut to size for your humidifier Filter replacement: the cotton filter rod of the humidifier needs to be replaced depending on use and water quality after 3-4 months of use. Keep a reasonable and regular replacement frequency to make the spray clearer and bring you better filtering effect. How to use: just cut the cotton swab of the humidifier to the correct size and put it into the humidifier directly. Cotton Material: Made of high quality cotton, our humidifier filter element has good water absorption, you can soak in water without yourself worry about deformation and pilling, letting you enjoy a good condition and bring you a good mood. What You Get: You will receive a total of 24 replacement humidifier pads, enough for you and your family to replace for a lasting experience.