The AdirOffice cutting mats are made from 3-ply high-tech polymer material. Constructed with a self-healing surface the mats are extremely durable and hold up under repeated use with art and mat knives or rotary cutters. The cutting mats are 3 mm thick and made of 3 plies. The outer plies are 0.75 mm thick and give the mat self-healing properties. The inner core is 1.5 mm thick and prevents mat cut-through and extends blade life. Our pro-quality, self-healing mats have a medium tooth texture, non-glare surface, and are graduated on all 4 sides. Mats are hashed to every 1/8 in. and graduated to every with every inch marked with a heavier line. Grid pattern includes guide lines for 15°, 30°, 45°, 60°, 75° angles on 1 side and 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° on the other side and grid lines. Our cutting mats also have lines for cutting diagonals. Our mats come also graduated in Centimeters and Millimeters.