I weigh 145 lbs The chair has five wheels for support and it sits on carpet that has 1/2 foam and 1/4 carpet. If I sit at one spot for more then a few minutes the wheels significantly dent the mat to the point that it takes effort to move the chair. Would not purchase again.
I should have read the reviews before purchasing. This is not a very durable mat. It gets indentations easily. It is starting to crack. It is time to buy a new more durable mat. It lasted about 2 years