Mat is of sturdy construction very clean rectangular design. Slides a bit on repeated movement could use tacky backing on one side to help resist sliding effects on hardwood floors.
I did not use this mat under a chair. Rather I used it to support a large parrot bird cage and protect the carpeting under it. It worked out perfectly.
The chair mat is what we were looking for. We just put a new area rug down and did not want the sticklers on a regular chair mat to tear it. So we went with the less stickler and it tends to slide a little. Nothing we cannot deal with.