The Architec Gripper Bar Board is made of Polypropylene cutting surface thermally bonded to a soft bed of gripping octagons, providing a non-slip grip. The surface won't dull knife blades and the soft feet grip the countertop so the cutting surface does not move while you are working. The Bar Board is sized for use indoors or out, in the kitchen or on a bar. The Gripper Bar Board is dishwasher "encouraged".