From Paizo's website:
A fantasy RPG world is filled with tough customers, and the worst end up here, in prison! From the guard tower to the interrogation chamber to solitary confinement, Flip-Mat: Prison is a perfect set-piece for any campaign, and it makes an intriguing home base for heroes (or villains!) who take it over. It’s a riot!
This portable, affordable map measures 24" x 30" unfolded, and 8" x 10" folded. Its coated surface can handle any dry erase, wet erase, or even permanent marker. Usable by experienced GMs and novices alike, GameMastery Flip-Mats fit perfectly into any Game Master’s arsenal!
On tabletops across the world, the Flip-Mat Revolution is changing the way players run their fantasy roleplaying games! Why take the time to sketch out ugly scenery on a smudgy plastic mat when dynamic encounters and easy clean-up is just a Flip away?