The MyfatBOSS Pet Fountain Filter Replacement is a great way to keep your pet’s water fresh and clean. The filters are made of activated carbon, ion exchange resin and non-woven fabric, and they can remove hair, heavy metals and bad tastes from the water so that your pet can drink clean and fresh water. The filters are easy to change out every two or four weeks, so you’ll always have fresh filters available when your pet needs them.