Doom From the Deep! Dare the deadly depths with Pathfinder Flip-Mat: Cavernous Lair, with one side featuring a view of barren, cave-pocked cliffs, and the other presenting a tangled maze tunnels and caverns. Measuring 27-inches x 30-inches, this Flip-Mat features a coated surface that`s designed to handle any dry erase, wet erase, or even permanent marker.