The sponge was made of cellulose fiber, which is natural and soft enough for your swimming pools, floors, bathtubs, fish tanks, protects the surface from scratches. The household scrub brush is a versatile and effective cleaning tool that can be used indoors or outdoors. The scrub brush is designed to easily and efficiently move through grime and stains with minimal effort. Using a manual brush to clean tile is hard work. And that's why we've specifically designed our scrub brush handle to be as ergonomic as possible. The handle is ergonomically shaped which allows for a much better grip, while also making it much easier and more comfortable to use. It can help you get rid of dirt around your spa and grime in the inner side of the pool.Our sponge brushes not only clean the pool, they can also remove stubborn dirt from pots, pans, glasses, baking pans, homes and kitchens, making life more cleaner and brighter. Ideal for cleaning hot tubs, swimming pool, baths and spas, aquarium and boats. These scouring sponges can also be used to scrub and clean walls, floors, desks, countertenors and other kitchen equipment.