The mat is 3 mm thick and as expected very stable. I can hardly imagine that they can be damaged during use. Also helpful are several white markings on the height and width in cm and inch dimensions on blue ground. These are very easy to recognize and consistently from all sides.
The mat can be use for so many activities such as sewing or cutting. It is the ideal base for tables, carpets (depending on where you work) not to damage.
And the price is okay because you have certainly a long time some of the pad.