Earth Friendly Cleaning Tools Renewable Bamboo Natural & Recycled Bristles Great for Cleaning all Produce, From Apples to Zucchini! Come Clean. Full Circle.Part bamboo handle, part natural & recycled bristle blend, entirely earth friendly. Basically, it"s as easy on the earth as the vegetable you clean with it. (You are buying organic, right?)This brush uses a unique bristle blend. Natural plant bristles hold soap for clean, sudsy action; recycled plastic bristles are earth-friendly and super durable. Plant fiber bristles naturally darken after soaking.