I ordered this particular chair mat after looking at all the mats offered by Staples. This mat is thick with non-pointed nubs on the bottom. It has a nice beveled edge allowing the chair to roll of and on the mat easily. It is thick enough that the chair doesn't depress the mat too much. You must expect some give but due to the thickness the flex is minimal. I would buy this product again. It was worth the extra cost over the cheaper mats.