We were hopeful that the thickness of this chair mat would be sufficient and "NOT" dimple when the wheels of the chair sit for long periods of time. Not the case. Of course I also understand that the carpet may have an influence on the outcome. Unsure of what to do next if anything.
The mat does just what is expected on our carpet. I love the larger size as it allows the wheels on the chair to move freely as I get in and out of it.