Store sales associate said it should be sturdy enough for my weight (210) but my chair pushes the pad down making indentations and it is hard to then roll the chair across the mat. I'm not happy with it at all.
I needed the larger chairmat because I have to roll around alot in my cubicle. The last one I bought was a little more firm and did not give way under the weight of me and my chair. This one seemed a tad thinner in construction. Nevertheless this is a good buy for the money.