Rubber-Cal "Eco-Safety Interlocking Playground Tiles - 2.50 x 19.5 x 19.5 inch - Pack of 10 Playground Mats, 28 Square Feet Coverage - 4 Colors Durable recycled rubber tire material makes for longer lasting playground surfacing Rated at a 6 foot critical fall height in total compliance with ASTM F1292-09 requirements Playground tiles are available in four fun, unique colors to add flair to any outdoor playground These rubber interlocking playground tiles are easy to install for temporary or permanent outdoor applications Waffle bottom design softens heavy impacts and absorbs vibration by flexing upon compression against concrete or asphalt