Save Cost - Regular replacement of the paper filter cartridge is part of the daily maintenance of the swimming pool, it will lead to increased costs and waste.Our reusable and washable foam filters are an ideal replacement for disposable filter paper!You don't need to replace filter sponges frequently.Good Filtering Effect - Our Foam Filter Cartridge has a high-density mesh structure that can filter a lot of impurities in the swimming pool, it can remove leaves, grass, hair, slag, pine, insects and other floating debris effectively.High Quality - Our Pool Filter Foam is made of high-quality sponge, the thickness is sufficient, the density is moderate, soft, not easy to deform, environmentally friendly, washable, reused, durable, has a long service life, perfect for S1 type filters.Reusable & Washable - Each Spa Foam Filter can be used for about 2 months.You can clean the filter sponges once a week to keep the water clean and reduce bacteria in the pool, our filter element is easy to clean and install.Application - Our washable foam filter is suitable for Type S1 and most pool filters on the market, keep the swimming pool, aquarium and spa clean.