Not very thick - so after a few hours of sitting the wheels of the chair create indentations in the mat thus making it more difficult to roll the chair - i'm average weight of 160 pounds too...
I like the chair mat I purchased from Staples in that it protects the carpeting my chair with rollers sits on. No more tattered carpet fibers. I will most definitely purchase one for my wood floors. Thank you!!
Had to return it. The office chair I got from Staples left divots in the vinyl and you’d get stuck in them making it hard to roll smoothly. Used on flat Berber carpet