1. What is SlabMat? SlabMat is a proprietary non-woven fabric that provides a smooth surface for clay work. Unlike canvas, SlabMat has no weave for clay dust to sift through, and therefore is cleaner for studio use. 2. How many pieces of SlabMat do I need? For long slabs (>23") on a slab roller, use two full-length sheets of SlabMat with the clay sandwiched in between. SlabMat can also be used in combination with canvas to get one side textured and one smooth. Place the canvas on the bottom for it to absorb the most water. For shorter slabs (