100 percent recycled rubber. Will not fade, rot, compress or lose its original beauty, even after years of exposure to the elements. Preserves ground moisture without absorption, helping keep plants healthy. Also safe for playground covering. Cushions falls on and around playground limiting injuries. Does not attract termites, carpenter ants or other harmful insects. Five times heavier than wood mulches, and will not float or erode during heavy rain and flooding. Inhibits growth of molds and fungi, reducing allergy risk. Miminizes dust.