I bought this mat to be used under my task chair at my office where I work up to twelve hours a day and sometimes 6 days a week. I have only been using it for a few weeks. No wear is discernible yet. My chair has five legs and has carpet casters. The chair moves very smoothly over the mat and easily moves back onto the mat when I go beyond its coverage. The mat is 46" by 60" which is the largest I could find. I could have used a 50" by 70" if it were available. My work station is surrounded by my desk a lateral file cabinet and credenza and a paper shredder. I constantly move throughout the day in all four directions. Before I had this mat my chair rode directly on the landlord's wall to wall industrial carpeting and the carpet was wearing thin.