Use it as a top to provide shade outdoors and/or as a floor mat for total pet comfort! Hook Arrows attach the mat to the top/bottom of the playpen quickly and easily! And it removes just as quickly and easily for cleaning. Designed to use with the L6 and H6 playpen in the hexagon configuration. Use as a top to provide shade outdoors or as a floor mat for comfort! Specially designed hook arrows attach the mat to the top/bottom of the pet pen quickly and easily!