Reusable Washable Filter: Replacing paper filter cartridges is an expensive part of pool maintenance. These washable and reusable foam filters offer an economical alternative. Long Runtime: Although the initial cost of this cartridge is slightly higher than paper cartridges, it lasts much longer, providing extended use and increased value. Durable: Made of high-quality foam, this filter lasts longer than paper cartridges and can be washed and reused multiple times, saving you money in the long run. Keep Clean Water: Designed to be an excellent water cleaner for swimming pools, this foam filter effectively removes dirt and impurities, ensuring a clean and enjoyable swimming experience. Compatibility: Specially designed to fit Type I/II/VI/D swimming pools, these filter sponges are available in different sizes to ensure a proper fit. Wash and re-wash for hassle-free care.