Rubberific!™ Rubber Mulch does not compact over time, preserving shock absorption and eliminating the need for frequent refills. Made of 100% recycled rubber, and free of steel belts, threads, and odors. ASTM recommended mulch depth is 6"; 40 lb bag covers 4 sq ft and 1800 lb box covers 200 sq ft. CPSC compliant. Actual freight and unloading charges apply on 1800 lb Box orders. Truck delivery.