KIDWISE Swing Set Playground Rubber Mulch 75 Cu.Ft. Pallet-Chocolate Brown Loose fill rubber surfacing is rated for almost twice the fall height when compared to other loose fill materials. Rubber Mulch provides a clean area of play than wood chips, and gives children a splinter free surface for play. Contains some nylon threads and is 99.9%steel free. Made of recycled rubber, and available in a wide variety of colors. Each Pallet will cover approximately 300 SF 3 inches deep. Comply with ASTM 1292.99 guidelines for safety surfacing guidelines.