This natural kitchen sponge is made from 100% loofah and sewn with 100% cotton thread making it fully compostable. Before your first use, place the sponge in water and allow it to absorb water and expand. Hang to dry after using. Dishwasher safe on top rack. Most sponges are made of plastic and not only are they around for hundreds of years but they allow microplastics to go down the drain and into our water systems. Replaces plastic kitchen sponges Compostable