Cutting Mat by Fiskars^® is a high-quality, self-healing cutting mat designed for rotary cutters and rotary blades. This extra-large Cutting Mat features an easy-to-read measuring grid with 30-, 45- and 60-degree bias lines on both sides. Self-healing technology means that this mat will not get cuts, grooves or nicks on the surface. It has both a light and dark side, making it easier to see and cut light fabrics on the dark side and dark fabrics on the light side. Store flat and away from sunlight, heat or cold. Cleans easily with warm water and mild soap.