I have purchased quite a few of these chair mats. They do the job but I am disappointed that they have to be replaced every 2 years. They crack and begin to deteriorate after 12-18 months of use and need to be replaced every 24 months or so.
I bought one of these in August 2022 and about 1 year ago it developed cracks as the plastic is brittle. Low spots make moving the chair casters difficult. Checked with Staples no warranty. Do not buy this item. You will be disappointed.
Can hardly support any weight. Chair casters get stuck in one position because the mat warps. I highly recommend a chair mat with at least 0.08" thickness to support a chair.