Your 100% plant-based, natural sponge, in a 2-layer sponge design for gentle cleaning. Cleans without scratching. Earth Sponge Duo Gentle Scrub Best for cleaning delicate surfaces, and for non-stick cookware, and glass kitchenware. Earth Sponge is free from bleach and chemicals. They are tough on grease and grime but delicate enough not to scratch! Perfect for washing items that require gentle scrubbing. Disposing of Earth Sponge is guilt-free since they are completely biodegradable. Just toss them in your compost bin and forget about them!