This is made with pure Cry Less wool. Baby Natura puddle pad keeps baby's mattress fresh and dry without the harmful toxins and chemicals found in many plastic pads. This uniquely woven pad provides a water repellent, yet naturally breathable barrier that discourages the growth of bacteria, mold and mildew. Its uniquely woven temperature regulating Cry Less wool naturally protects mattress from leaks or spills. It contains no harmful toxins, bleaches, off gassing or dyes.