EasyLink Non-Slip Tiles Engineered for Soft Level Surfaces such as Grass, Sand, Mud or Clay for Quick & Easy Outdoor or Indoor Flooring for all Hard Surfaces, High-Raised High-density polyethylene with Non-Slip Anti-Fatigue Surface. The perfect Interlocking Patio Tiles or Flooring to top any hard surface.. (Grey Lattice) (Starter/Ender Pack (20 tiles))