The Holmes/Sunbeam Filter E HWF100 Humidifier Replacement Wick Filter 3 Pack is a set of white cartridge filters designed for use with Holmes humidifiers. These filters are mold-resistant and antimicrobial-resistant, making them ideal for maintaining clean and healthy air in your home. The pack includes 3 filters, ensuring you have a supply on hand for regular replacement to keep your humidifier running efficiently. Made by Holmes, a trusted brand in home improvement and indoor air quality, these filters are compatible with the Holmes HWF100UC3 model and other similar humidifiers.