The chair mat was a perfect fir for my work area. It is made of sturdy plastic material and is holding up very well with the weight of the chair and myself on it. I recomend.
Quality has deteriorated since I got one a few years ago. I had to replace my older one since it was starting to crack in places - I had this probably 3-4 years and used it a lot. This one though is thinner and the wheels of our office chair is already making a pretty deep dent into it. Not sure I will keep it. May have to return.