Efficient CleaningThe sponge filter can filter many impurities in the swimming pool， extend the life of the filter media， ensure efficient water flow， reduce clogging， and achieve long-term filtration and purification. Very suitable for S1 filters.^Durable: The foam filter has good flexibility and high elasticity. The lifespan of the foam filter is longer than that of the filter element， and it can be cleaned and used repeatedly.^Cost Saving: Replacing the filter element of the paper filter is part of the daily pool maintenance. Save money with these clean， reusable sponge foam filters.^Applicable: Our washable foam filter and most swimming pool filters on the market suitable and suitable for swimming pools， bathrooms and aquariums. The vacuum pack we use will warp when opened， but will return to its original state in water.