Greener Clean Heavy Duty Scrub Sponges scrub 50% faster than Scotch-Brite® Greener Clean Non-Scratch Scrub Sponges and outlast more than 30 rolls of paper towels. Reusable sponges are an efficient, money-saving choice. Durable sponges are made from 100% plant-based fibers. The scrubbing fibers are made from 50% agave plant. Extend sponge's use and effectiveness by sanitizing in the dishwasher or by boiling. Sturdy sponges are an ideal choice for tough, baked-on messes.