Quickleaf
Legend
For routine exploration I like to use 2 blank Paizo flipmats, and draw as the PCs explore. That gives me 4 surfaces each of 24"x30", and if they all get used in 1 session I can wipe them and reuse.
Do you like them better than Chessex mats?
I have a few of the Paizo flipmats with terrain already on them and they are indeed very nifty.