Compostable Cellulose Sponges: These sponges can be used for many different cleaning purposes and surfaces from your dishes to cleaning the bathroom tiles. They can be washed and reused for up to 6 months. Material: 100% Wood Pulp. Care: Soak in Vinegar for 5 minutes and then rinse and air dry. Dimensions: Length: 4 ¼” Width: 2 ¾” Environment Fact: Plastic dish sponges have a short lifespan but pollute our planet forever. As they’re used, they release microplastics into our waters which can never be filtered out. Our compostable cellulose sponges are made with 100% Wood pulp which is naturally biodegradable and compostable. White only color available.