Impact Mats are designed specifically for trucks that have existing spray-in liner or no bed liner at all. The all new design has an integrated tailgate gap guard hinge that connects the bed piece to the tailgate piece. The TPO composite top layer construction offers a flat work surface, that is slip and skid resistant. The 3/4" padded under layer provide dent and impact resistance while offering cushion for your knees while crawling around in your truck bed. The Impact Mat install in minutes using hook and loop fasteners to install without the need to prep, sand or drill holes into your truck bed.