Mat woulld be much better if made of thicker more ridged plastic. Don't like the dimples in the mat that make it hard to roll around or change position.
This was a replacement for a cheaper mat so we do not know how well it will hold up under a years use. The limited lifetime warranty was the controlling factor in our purchase.
Nice mat needed if you have a weight on the chair and it is over a rug. I have the other less thick which my wife now has. She weighs less. Great buy for the money.