Save Cost - Regular replacement of the paper filter cartridge is part of daily pool maintenance, it will lead to increased cost 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 which can filter out a lot of impurities in the 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, eco-friendly, washable, rutilable, durable, has a long service life, perfect for S1 type filters. . Reusable & Washable - Each Spa Foam Filter can be used for approximately 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 pool, aquarium and spa clean. .