This chair mat is a typical vinyl product. I purchased it for my recently renovated home office. Unfortunately with the thin vinyl material combined with the carpet padding the chair wheels leave divots in the mat and to a lesser degree the carpet below. I would only try using this mat over the thinnest of carpets without padding. Otherwise I would avoid it.
the mat is very thick. It does not sink into the plush carpet. I have a computer table sitting on it and it does not wobble. I am very pleased with this mat.
Size of the mat is good a little bigger than the previous one. Appears to be solid enough but I do see "indentations" where the chair wheels are - hopefuly that won't be a problem over time.
I just wanted to keep my chair from ruining my carpet. I think this fits my needs perfectly. Others say its thin and chair wheels get stuck. Well I weigh 210 and sure it sinks in a little. But it still roles out easily. This size is also perfect for my to sit in a roll up to my desk and not take up too much space on the floor. I'm happy with my purchase