The carpet chair mat is too thin and flimsy. I have a small-size office chair on rollers and the rollers have already made deep dents in the carpet chair mat. I had the old one for more than 20 years without this problem. I would gladly have paid more for a mat that works.
I wanted a stiffer mat this one came rolled up and it’s more flexible than I needed. It’s placed on carpet and “dents” where the chair rollers are. Since it was ordered on line and delivered I just kept it. Next time I go into the store and buy the right thing.