HDPE Ground Protection Mat 4x8 S ize. 4x8 ft (1220*2440mm) 3x8 ft (910*2440mm) 2x8 ft (610*2440mm) HDPE Ground Protection Mat is a high-density polyethylene board used in short-term and long-term project impact resistance, toughness, shock HENAN OKAYorption and moisture resistance.