A 100% compostable kitchen sponge from Zefiro, made of dried loofah (or luffa, a plant from the squash and gourd family) and cotton thread. Simply soak in water before first use to allow it to soften and expand. Hang to dry. Dishwasher safe on top rack. Try it today and help keep microplastics out of the waterways - which is what happens with most plastic-based sponges.