Cost saving and reusable design Washable foam filters disposable paper cartridges, reducing ongoing pool maintenance costs. They can be washed and reused multiple times. Typically paper cartridges are replaced weekly, while these foam filters can be easily washed, reinserted, and used again. Practical design and compatibility Designed to paper cartridges in compatible pool filter systems. The foam is durable enough to withstand routine use and repeated washing. Improves water quality and performance density foam traps dirt, helping to keep pool water clean and contributing to reduced germs in the pool. Strong filtration capability with durable, environmentally friendly materials. Environmental protection and maintenance Breathable foam with effective cleaning action supports clean and comfortable pool water while being environmentally friendlier than frequent cartridge disposal. Key attributes Material: foam Function: filtration Performance: density dirt blocking Reusability: washable and reusable Durability: designed for repeated use and long life Use scenarios Regular home pool maintenance: reduce frequency of replacing paper cartridges while maintaining water quality. Outdoor pools with heavy debris: easy washing and reuse helps manage dirt and upkeep without frequent cartridge changes. Seasonal or rental pools: economical option for repeat use between drainandfill cycles or guest turnover.