These Adir Reversible Self Healing Cutting Mats are perfect for artists, photographers, designers, scrap-bookers and hobbyists of all sorts! Designed to be with you for many many precise cuts to come.The Adir Reversible Self Healing Cutting Mat is made of new, 3-ply high-tech polymer material, the most flexible utility and rotary cutting mat on the market today! These self healing mats hold up under repeated use with art and mat knives and all types of cutters. At 3 mm thick, these mats feature 3 plies. The outer plies are .75 mm thick and contain self-healing properties. The inner core is 1.5 mm thick and prevents mat cut-through and also extends blade life. The medium tooth texture, non-glare surface and graduated four sides with hash lines extending outside of the border make it professional quality! They are hashed to ever 1/8" and graduated to every 1/2" with every inch marked with a heavier line. Angle grid patterns are included as are diagonal cuts. Graduated in centimeters and millimeters. One side is black, the other green.