The Catit Fresh & Clear Drinking Fountain Foam / Carbon Filter is a 3-pack replacement media specifically designed for the Catit water fountain. Made by Hagen, the filter features a white foam and carbon material that effectively removes impurities and keeps water fresh and clean. This filter ensures your feline companions have access to clean water at all times, promoting good hydration habits and overall health. Easy to install and durable, this filter is an essential component in maintaining your Catit water fountain's functionality.