This chair mat was the only one available and is not nearly as substantial as one I purchased a few years age. The mat is on low pile carpet and Imprints from my desk chair are clearly visible. I do not recommend this mat.
I would not buy this product in the future. The plastic starts to indent where the wheels of your chair are and thus create molded indentations that the chair gravitates to. I needed a pad that would NOT do this. I'm going glass next time.
An office chair with five casters moves much better with the vinyl mat on top of the carpet. The price was economical but a more expensive solid mat would work even better.