Gale Force Nine’s Official DUNGEONS & DRAGONS Dungeon Master’s Mat Set contains TWO vinyl game mats for staging your own encounters and adventures. One mat is a simple 1” grid of stone tiles, the classic dungeon environment. With this mat, a DM can mark walls, doors and other dungeon features using a wet-erase marker. This mat will be the staple battle grid for any indoor encounter. The other mat is a green grass field; ideal for staging outdoor confrontations. Like the other mat, a few quick marks from a wet-erase pen customizes the mat with whatever elements the encounter calls for. Add a tree line, forest path or campsite and let the battle begin. The Dungeon Master’s Mat Set is an indispensible tool for every DM!