Cutting Mats are made up of a unique self healing composite material which offers a non-stick, non-marring surface. These professional cutting mats are self-healing on both sides, meaning that they will literally heal themselves from the light cuts and dents caused by average use. They are impervious to cuts, abrasions, & liquid spills, and they will not dull the blade in use. These features provide you with the "brand new" product look, feel, and performance... even after months of use. All Cutting Mats feature 1" grid lines and 1/4" graduations on the base and left-hand vertical edges; so measuring your items has never been easier. Self Healing Cutting Mats are perfect for using as a desk blotter, work surface, and so much more. These cutter mats are opaque gray and feature a matted non-glare surface, making them perfect for use in a room with high or bright lighting.