henan okayMATS, 4’X8′ Black Mat, Ground Protection Mat Call for Price. Description. henan okayMATS, 4′ x 8′ Black Mat; Original Ground Protection Mat Quantity Discounts Available henan okayMATS produces heavy duty 1/2″ thick 100% polyethylene mats which feature a slip-resistant, Outrigger Pad cleat design on both sides. henan okayMATS also offers the Outrigger Pad cleat