Better not to use these on thick carpet.I have med size rolling office chairs and using this matt over thick carpet isn't as easy as I expected. It's O.k. but there is drag. It's not unbareable and I'm not distracted enough to ditch the two I purchased and get two higher end ones yet. These are just O.k. I paid [$] on sale for each. If I could go back in time I would've sprung for the $40 ones. But until these die I'm not going to do anything.
a really good mat but the odor is so strong I had to place it outside for awhile and then put it in the back of the house - I wish manufacturers could find something to put in the plastic to deodorize it.